how to specify one ip address when send message on client

[cpusoft]

hi,
i  use one machine as mina client to send message, but it has multiple
network ip cards and  multiple ip address , and i have to specify one ip
address as the client of mina,

but, i do not find the funtion to specify the local ip address as the
client of mina to send message ?  which function?

my code is:
public static void main(String[] args) {
 NioSocketConnector connector = new NioSocketConnector();
DefaultIoFilterChainBuilder chain = connector.getFilterChain();
 ProtocolCodecFilter filter = new ProtocolCodecFilter(new
ObjectSerializationCodecFactory());
chain.addLast("objectFilter",filter);

connector.getSessionConfig().setUseReadOperation(true);
connector.setHandler(new ClientMinaServerHanlder());
 connector.setConnectTimeoutCheckInterval(30);
ConnectFuture cf = connector.connect(new
InetSocketAddress("minaserverip",9988));
 cf.awaitUninterruptibly();
 cf.getSession().getCloseFuture().awaitUninterruptibly();
 connector.dispose();
}

public class ClientMinaServerHanlder  extends IoHandlerAdapter{
  @Override
       public void sessionOpened(IoSession session) throws Exception {
....
}
 @Override
public void sessionClosed(IoSession session) {
            ....
}

@Override
public void messageReceived(IoSession session, Object message)
throws Exception {
 ........
}
}

plz help me ,thx