There's no built in way to do that. If you are using a pure Remoting client / server system, then you could send the certificate along with the invocation in the "metadata map" passed to the org.jboss.remoting.Client method

 public Object invoke(Object param, Map metadata) throws Throwable;

If you're using a system like EJB3 where Remoting is running under the surface, it would be harder to do, though you could probably do something with a custom interceptor on the client side.