Posting To GROUP (not Page) & Content Locking

Is it possible to have new posts go to a Group (in much the same way they can go to a Page).

Also, is it possible to restrict access to a Wordpress site based on whether a user is a member of a certain group?

I understand this can be done by using the JSDK, and Facebook App with groups permissions, and simply look for the presence of the Group ID in the user object. As I'm using Ultimate Facebook, I'd rather leverage it, than writing a separate set of code which includes an instance of JSDK etc.. However I don't want to modify the code of UF obviously... is there some way to instantiate UF and make use of it, through a separate plugin, or should I just do the group-content-locking isolated from UF?

Thanks for any help you can offer.