show public usergroup in postbit

[mfacer]

I've already seen one post here which suggests to use:

Crew: <if condition="is_member_of($post, 63)">Such and Such group</if><if condition="is_member_of($post, 64)">Such and Such Other group</if>

to display which public usergroup the user is in, in the postbit.
I don't want to hard code this as above, I'd like to somehow get the usergroup they are in, and display the title of the group - and maybe a hyperlink to the join page of that group.

Is this possible?
thanks.