this is not something
out-of-the-box. However jBPM can be configured to use JMS as a message box for tasks.
There a various threads about using Seam with JMS (has some tricks).
Thank you for your reply, Leo, but I am not dealing with JMS.. what I really want to do is to find a way to access the JbpmContext object of a remote Jbpm engine, maybe exploiting the JNDI interface.