From what I’ve been able to piece together, the two Worgen focused guilds on Moon Guard are:
The Gilnean Concord which is more focused on Gilneas itself and an all encompassing Gilnean society where Worgen feature prominently but not exclusively.
~and~
Cult of the Wolf which is Worgen dominated and focuses more on werewolf aspects of things and is tied to the Wolf Cult of Northrend more than the Kingdom of Gilneas.
(My sincere apologies if I am incorrect in any of these descriptions or if I have forgotten or overlooked any guilds!)