How make internet connection focus on one task

Hello helpful experts,

I have a slow internet connection, and am running automatic updates, utorrents etc. BUT I also have a webcam that I want to talk to my girlfreind and fam with.

Is there a way to make all my bandwidth focus on the syke webcam link, and not have it used up by the other things (ie if there is any bandwidth left after transerring back and forth the web cam conversation then it can go to my downloads etc, but that the web cam conversation takes first priority).

Thanks in advance Marcus