I dont think so, in all honesty I dont know of any that can.
You could do it using a router that has 'quality of service' (QoS) as this would in theory dictate who gets priority on the network so if you and you flat mate were online you would get priority but when it's jsut him/her he would have free reign.
Also in my experience it's a bag of mixed grapes as to its effectiveness as I tried setting it so my xbox has priority so I can still game when others use the internet though it can still be laggy but that may be just because I only have 2mb bandwidth
For reference, the AE DOES NOT have QoS as far as I know