i'm running snow leopard on macbook pro. my college has free internet access and every hostel has different IP addresses assigned. my hostel has this IP address 10.165.x.x the students keep changing their IP address and somehow my macbook pro disables me from accessing the internet when a windows OS user in the network uses the same as mine. Somehow windows OS doesn't allow the second user to use if its already taken but my poor mac OS allows it even while m using and i'll be thrown out. i'll have to look out for a new ip address which is not taken already. any help as to how i can protect my own IP address?