Whilst I cannot tell you how the magic happens so to speak. I can tell you that gamban® does not affect other users on the network, and there is no reason why anybody should find out that you're protected by gamban®. The only way somebody could find out that you're protected by gamban®, is if they happen to be using your device and attempt to access a gambling site.
gamban® uses a multi-faceted approach to ensure that only gambling sites are blocked, this is something that other blocking software cannot provide.
If you have any specific questions please contact firstname.lastname@example.org.