You could use the module in Prat (and Chatter?) that allows you to assign an alias/alternate name to characters. Then your chat would look like this:
LolHealzAlt (Meatshield's Alt) has come online.
[Guild] LolHealzAlt: (Meatshield's Alt) evening, everyone
[Guild] Felara: hi there
[Guild] Frostie: (Ryan) howdy
Or, you can get something like
http://www.wowinterface.com/download...otesUNeed.html