It's too easy, Just add This line at GlobalManager {}
PHP Code:
NetCafeIPRefreshTime 10
MaxUserForNonePCBangIP 10
This will make limits 10 connections per IP if the ip isn't official (Like GM ip or gamepang ip and so on)
at MaxUserForNonePCBangIP change 10 to more or less as you want for the limits per ip u need .