I'm gonna guess he's just got some kind of logging program running. After all, anybody who plays with you on a table can see how much you're winning or loosing.
Hopefully he's just running something that keeps track of all the tables he's playing on, as a memory aid. My cynical side suspects that there may be software out there though that will watch all the tables on a site...
This is just speculation from a computer techie though, if I were you I'd wait for someone with more experience of poker sites
to reply properly.