Unless you can get Anonymous on the case, probably not. I'd just turn off the WiFi when you're not using it. If he's truly going nuts with the bandwidth-hogging, that means he's using it a lot. If he finds he can't use it at all for long periods, he might get frustrated enough to get his own WiFi.
Answer
Unless you can get Anonymous on the case, probably not. I'd just turn off the WiFi when you're not using it. If he's truly going nuts with the bandwidth-hogging, that means he's using it a lot. If he finds he can't use it at all for long periods, he might get frustrated enough to get his own WiFi.