From Ashayo:

I would guess most ppl in AIE use the Identity addon to let everyone in all the co-guilds know who our main is, etc... I think this would be a wonderful function to add to GreenWall itself! something easy to configure like the rest of GW already is; for example: /gw identity main (Stigg) or something like that. As I do not program addons or am too familiar with LUA or whatnot, I haven't a clue as to how difficult this would be to implement. Seems like it would be a really nice addition for something most of us use anyway 8). Thanks, and nice job on GW itself.

While we've been talking about doing this for a while, it would require a bit more feature creep than I am comfortable with. A better approach would be to develop a stand-alone add-on.