Can anyone help me about blocking utorrent, limewire or any application that downloads any file from our internet connection? is there a way that i can block the applications to the router? we are currently using DLINK DI-604 router.

Some of our diving instructors keeps on downloading files and eating all the bandwidth. If someone can help me about this, you may leave your contact number here and i can call you. or you can just leave instructions here. thanks!