can you restrict access from certain pcs to your home router? (Linksys)
 

I don't want to completely knock them off, just don't want them hogging the fuck out of the connection I pay for when I'm trying to play xBox...

You can limit by the mac address this should do what you need.

I've got a linksys router, and am looking around through the admin panel trying to find out where I can set this up. I'm under access restrictions now, but how do I find the MACs of the PCs which are connecting to my router? I see all the local machines popping up when my xBox is live. Isn't there some way I can see who has connected to my network and restrict access on a case by case basis easily? 3rd party application perhaps?

get DD-WRT and setup QoS I think it's called

basically you can control what gets preferred bandwidth use.

which linksys router do you have?

Look under applications gaming/qos

to answer your other question its under status/local network

That's where I'm at, but it doesn't seem much use to me if I can't find the MAC address of the connection. Where can i look this up on the router? Surely the connecting devices are logged somewhere?

Just found it under Wireless MAC Filters.