IANAL, but I think it's perfectly legal.
"But if a customer walks in, could they ask for his/her address, and
reject him/her if he/she doesn't have a local address?" - I just got
back from Australia and not only is this legal, it's common. The bowls
clubs refuse entry to someone if they're within
Background: Apple deleted several apps (OpenDoor, FreeWeibo etc) from the
China App Store last year, claiming that they broke Chinese laws. The
censorship is not based on the actual location of the user, but on the
address which the user used to register the account.
Question: Let's say that a US