Zxin,

not sure if you are still interested but you should be able to set a variable on each client by using the addon communication channel... much the same way as KTM and Raid mods do.

I haven't looked into the LUA for this yet myself... but as I intend to dualbox shammies (funds / GF won't stretch to 5 accounts just yet) I hope to do so in the near future.

Djarid