I would have to say... maybe. I'm not sure if they would be able to track the name of the file you're downloading. However, I'm almost positive they would be able to track that you downloaded a file. Also, I think if anyone looked, they would be able to see some strange network traffic patterns because of the Gnutella client. While your company probably doesn't explicitly forbid running Gnutella clients at work, I think as soon as they found out you were running it, they would tell you to stop. They would probably call it "Inappropriate use of company resources", or some such. I would recommend not risking it, and just wait til you get home.

Dave