Within u-torrent, there should be a way to limit the ammount of badwidth that the client is avaliable to use. I've never used u-torrent but I use a program called Azureus for torrents in which I'm able to set the ammount of up/download badwidth avaliable.
In Azureus its under Option > Transfer > then up/download are individual.
This way you could limit the ammount of bandwith that he gets ie. divide your badwith by the number of people and viola, even sharing.