track UI, can it trigger an event or command

[qwertyuiopp]

I would like on my track window to have a regular game command activate if I click on a charactor's name. Basically if I click on a player, I would like to automatically do a /who <playername>

Is this possible? I downloaded the UI builder and a copy of my favorite track mod, but can't seem to find how I would implement this.

Thanks.