Can you explain a little more about what you're trying to accomplish? JFBConnect does create a user in K2 and can import their profile information. From there, I'm a bit confused if you want:
* To assign the user to a specific K2 user group so that they can post their own content
* Display a specific menu for K2 things to users that have logged in
Right now, we don't have a way to configure the K2 user group new users go into. However, it's extremely easy to set that in the code, if you'd like.
Thanks,
Alex