If this isn't what you mean, I apologize in advance. I am not a morning person.
This was the answer I received from Jeff:
1. Via the current identity object:
from turbogears import identity
if 'admin' in identity.current.groups:
pass
2. Via the user object on the current identity:
from turbogears import identity
if 'admin' in [g.groupId for g in identity.current.user.groups]:
pass
