Need help with router redirecting?

Ok, I know my question here is gonna be stupid but still i can't think of keywords to google for (English is not my native English).
My friend has a internet connection sharing with a kid. He paid everything, and never complains anything when the connection got slowed down. But the kid acting almighty asked him to turn his torrent downloading so the kid can get a smoother X360 online playing. 8-}
That hit the spot. He decided to play some prank back. (Considered BAN MAC address but it's not evil enough)
Sr, that's offtopic enough. I just wanna ask is there anyway to make the display of a specific user/IP address becomes fuzzy or blur or turn upside down when they viewing things on the internet? I read on the forums that someone was able to do that with PC, i wonder if that's possible for X360. Thxs very much for any help!!!!
BTW, he is using a Belkin G+.

 

You can't really alter what he is viewing on his Xbox. The only thing you can do is access the router management console, and apply WPA passwords, to lock him out of his own network.

Also, your friend may as well buy a new router and sign up for an internet connection. DSL subscriptions are very cheap nowadays. If you look around, you can probably get decent speeds for around $10 a month or so.