Keep wifi connected after log off Is there a way to maintain a wifi connection after log off on OS X 10.8 Lion?  

I would like to be able to log in, log off, and log into a new account on my domain without having to plug in my ethernet cable.
Set DisconnectOnLogout=NO:

sudo /Sy*/L*/Priv*/Apple8*/V*/C*/R*/airport en1 prefs DisconnectOnLogout=NO


Replace en1 with the interface number of your AirPort card, if it's different.