I have a problem... Lets say i have 3 users in Mac OS and i need to block wifi on 2 of them. So if my mac is used at home/near free wifi only the main user would be able to connect and for other two wifi would be disabled. (still i should be able to use iphone tethering from them) I know its kind of weird request..but ive got my reasons... Thank You, Best Regards UPD Thanks everyone, but let me give you more details on my issue. 1)Im the only one using this MAC. 2)Im ebay seller with multiple acc's. 3)In order to use few acc's on 1 computer - i need to access it from different IPs and have cookies separated. 4)My primary acc is using homes wifi network with static ip, other acc's will use Iphone tethering with dynamic IP. So basically what im trying to do is to eliminate the chance of logging into my account using same (wifi) network. Of course i can disable wifi everytime i change mac-account to secondary, but there is always 0.01% to forget that once and mess everything up. The problem is when i just delete airport from network settings panel it apply's this change to every macbook account, instead of changing it in the one i'm logged in. Otherwise my problem would be solved.