So, I’m at work, and I was updating my iTunes library, and when I went to shut it down, I noticed that a user was connected to my library. There really is no easy way (on a MAC) at least to finger this out. What I had to do was open up terminal, and issue the following command: lsof -i | grep -i itunes
This returned the name of the computer that was attached to me. With this info I was able to find the owner in our Systems Management Suite.
A lot of work to get to this, but useful.