Index: src/main/java/org/oasisopen/sca/client/impl/SCAClientFactoryFinder.java
===================================================================
--- src/main/java/org/oasisopen/sca/client/impl/SCAClientFactoryFinder.java	(revision 774735)
+++ src/main/java/org/oasisopen/sca/client/impl/SCAClientFactoryFinder.java	(working copy)
@@ -9,9 +9,14 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.net.URI;
 import java.net.URL;
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.List;
 import java.util.Properties;
 
+import org.oasisopen.sca.NoSuchDomainException;
 import org.oasisopen.sca.SCARuntimeException;
 import org.oasisopen.sca.client.SCAClientFactory;
 
@@ -55,17 +60,22 @@
      * @throws SCARuntimeException Failed to create SCAClientFactory
      *                 implementation.
      */
-    public static SCAClientFactory find(Properties properties, ClassLoader classLoader) {
+    public static SCAClientFactory find(URI domainURI, Properties properties, ClassLoader classLoader) throws NoSuchDomainException {
         if (classLoader == null) {
             classLoader = getThreadContextClassLoader();
             if (classLoader == null) {
                 classLoader = SCAClientFactoryFinder.class.getClassLoader();
             }
         }
-        final String factoryImplClassName = discoverProviderFactoryImplClass(properties, classLoader);
-        final Class<? extends SCAClientFactory> factoryImplClass = loadProviderFactoryClass(factoryImplClassName, classLoader);
-        final SCAClientFactory factory = instantiateSCAClientFactoryClass(factoryImplClass);
-        return factory;
+        final String[] factoryImplClassNames = discoverProviderFactoryImplClass(properties, classLoader);
+        for (String factoryImplClassName : factoryImplClassNames) {
+           final Class<? extends SCAClientFactory> factoryImplClass = loadProviderFactoryClass(factoryImplClassName, classLoader);
+           final SCAClientFactory factory = instantiateSCAClientFactoryClass(factoryImplClass);
+           if (factory.supportsDomain(domainURI)) {
+              return factory;
+           }
+        }
+        throw new NoSuchDomainException("No such domain or no available SCAClientFactory"); 
     }
 
     /**
@@ -87,18 +97,18 @@
      * @throw SCARuntimeException Failed to find implementation for
      *        SCAClientFactory.
      */
-    private static String discoverProviderFactoryImplClass(Properties properties, ClassLoader classLoader) throws SCARuntimeException {
+    private static String[] discoverProviderFactoryImplClass(Properties properties, ClassLoader classLoader) throws SCARuntimeException {
         String providerClassName = checkPropertiesForSPIClassName(properties);
         if (providerClassName != null) {
-            return providerClassName;
+            return new String[]{ providerClassName };
         }
 
         providerClassName = checkPropertiesForSPIClassName(System.getProperties());
         if (providerClassName != null) {
-            return providerClassName;
+            return new String[]{ providerClassName };
         }
         
-        return checkMETAINFServicesForClassName(classLoader);
+        return checkMETAINFServicesForClassName(classLoader).toArray(new String[]{});
     }
 
     /**
@@ -128,34 +138,40 @@
      * @return The class name for the SCAClientFactory implementation or
      *         <code>null</code> if not found.
      */
-    private static String checkMETAINFServicesForClassName(ClassLoader cl) {
-        final URL url = cl.getResource(SCA_CLIENT_FACTORY_PROVIDER_META_INF_SERVICE);
-        if (url == null) {
-            return null;
-        }
-
-        InputStream in = null;
+    private static List<String> checkMETAINFServicesForClassName(ClassLoader cl) {
+        List<String> names = new ArrayList<String>();
         try {
-            in = url.openStream();
-            BufferedReader reader = null;
-            try {
-                reader = new BufferedReader(new InputStreamReader(in, "UTF-8"));
+            final Enumeration<URL> urls = cl.getResources(SCA_CLIENT_FACTORY_PROVIDER_META_INF_SERVICE);
+            if (urls == null) {
+                return names;
+            }
 
-                String line;
-                while ((line = readNextLine(reader)) != null) {
-                    if (!line.startsWith("#") && line.length() > 0) {
-                        return line;
+            while (urls.hasMoreElements()) {
+                URL url = urls.nextElement();
+                InputStream in = null;
+                try {
+                    in = url.openStream();
+                    BufferedReader reader = null;
+                    try {
+                        reader = new BufferedReader(new InputStreamReader(in, "UTF-8"));
+
+                        String line;
+                        while ((line = readNextLine(reader)) != null) {
+                            if (!line.startsWith("#") && line.length() > 0) {
+                                names.add(line);
+                            }
+                        }
+                    } finally {
+                        closeStream(reader);
                     }
+                } finally {
+                    closeStream(in);
                 }
-                return null;
-            } finally {
-                closeStream(reader);
             }
         } catch (IOException ex) {
             throw new SCARuntimeException("Failed to discover SCAClientFactory provider", ex);
-        } finally {
-            closeStream(in);
         }
+        return names;
     }
 
     /**
Index: src/main/java/org/oasisopen/sca/client/SCAClientFactory.java
===================================================================
--- src/main/java/org/oasisopen/sca/client/SCAClientFactory.java	(revision 774735)
+++ src/main/java/org/oasisopen/sca/client/SCAClientFactory.java	(working copy)
@@ -4,8 +4,10 @@
  */
 package org.oasisopen.sca.client;
 
+import java.net.URI;
 import java.util.Properties;
 
+import org.oasisopen.sca.NoSuchDomainException;
 import org.oasisopen.sca.client.impl.SCAClientFactoryFinder;
 
 /**
@@ -31,9 +33,10 @@
      * Services.
      * 
      * @return A new SCAClient
+     * @throws NoSuchDomainException 
      */
-    public static SCAClient newInstance() {
-        return newInstance(null, null);
+    public static SCAClient newInstance(URI domainURI) throws NoSuchDomainException {
+        return newInstance(domainURI, null, null);
     }
 
     /**
@@ -43,9 +46,10 @@
      * @param properties Properties that may be used when creating a new
      *                instance of the SCAClient
      * @return A new SCAClient instance
+     * @throws NoSuchDomainException 
      */
-    public static SCAClient newInstance(Properties properties) {
-        return newInstance(properties, null);
+    public static SCAClient newInstance(URI domainURI, Properties properties) throws NoSuchDomainException {
+        return newInstance(domainURI, properties, null);
     }
 
     /**
@@ -55,9 +59,10 @@
      * @param classLoader ClassLoader that may be used when creating a new
      *                instance of the SCAClient
      * @return A new SCAClient instance
+     * @throws NoSuchDomainException 
      */
-    public static SCAClient newInstance(ClassLoader classLoader) {
-        return newInstance(null, classLoader);
+    public static SCAClient newInstance(URI domainURI, ClassLoader classLoader) throws NoSuchDomainException {
+        return newInstance(domainURI, null, classLoader);
     }
 
     /**
@@ -69,11 +74,12 @@
      * @param classLoader ClassLoader that may be used when creating a new
      *                instance of the SCAClient
      * @return A new SCAClient instance
+     * @throws NoSuchDomainException 
      */
-    public static SCAClient newInstance(Properties properties, ClassLoader classLoader) {
+    public static SCAClient newInstance(URI domainURI, Properties properties, ClassLoader classLoader) throws NoSuchDomainException {
         final SCAClientFactory factory;
         if (defaultFactory == null) {
-            factory = SCAClientFactoryFinder.find(properties, classLoader);
+            factory = SCAClientFactoryFinder.find(domainURI, properties, classLoader);
         } else {
             factory = defaultFactory;
         }
@@ -86,4 +92,6 @@
      * @return A new SCAClient instance
      */
     protected abstract SCAClient createSCAClient();
+
+    public abstract boolean supportsDomain(URI domainURI);
 }