Originally Posted by Jk
I tried commview but it asked me to choose my wireless card so I guessed that it is for connecting to wifi hotspots. I want a program that tells me who is using MY wifi.
You'd likely need some sort of addon for your router, as that's where all the traffic is routed through, not your computer. Usually there is a little box on some page in the router config that tells you how much bandwidth has been used since the router was turned on, but it doesn't log the MAC address or any other details of the machines that contributed to it. There could be some custom firmware for your router model that has a feature similar to your description.