Hi guys. I have a home network that is basically unlimited bandwidth; It's not, but try as I might I never reach the limit. Then I have wireless internet through cell service in my truck; it only has 2gb of bandwidth. My problem comes in when I leave things downloading on the home network; and then get in my truck; I end up with really large bills on the wireless network ~$150. Obviously the simple solution would be to turn all the downloads off, when I get in the truck; but it's harder to remember than one might think. I want to leave the internet on to download map data and receive emails; on the go so just turning it off and on, is not solution. Is there a way I can set my mobile network; to only allow; OSX Mail; Firefox; and Google Earth (these are just examples there will be others that work in tandem with Google earth). The router is basic and does not appear to have a feature to do that; so what I am envisioning is a program on the mac, that allows free flow on the home network; but automatically restricts the network when it connects to the wireless network. Thank you ahead of time for any help! all my search's have turned up empty; maybe I just don't know what to ask.