specific files, especially studio pre-release (ex, for academy award consideration) movies and some musical albums, are tracked by the companies that released them to incriminate download hosts more often than other files types
for instance if you were to seed a file named Universal_studios_Newest_Movie.avi, there's a higher chance you're getting tracked and gonna get in trouble (newest movie being the name obviously).
there's a number of "protection" softwares available for peer-to-peer client users which are meant to more of less protect us from the prying eyes of those companies
one that is regularly recommended is called PeerGaurdian2. I can't post links yet, but a quick search should do you fine finding it.
It's basically a software firewall program that essentially has an open source IP list blocking all those "known offender" companies and governments that like to screw people. You will inevitably be blocking regular users, but better safe than sorry IMO. Check it out, and be careful.
And yeah, hosting and/or downloading torrents from your office network is a pretty bad idea, especially uncapped. Because of the swarm protocol of torrents, you could potentially maximize the throughput of your computer (or servers...) network interface capacities and put a huge drain on your internet resources. Your admin will be pissed, and probably get you fired.