A fundamental difference between a local area network (LAN) and the Internet is the level of trust you can have in each. A LAN used in the home or an office is generally comprised of “friendly” computers, computers belonging to or operated by other family members or fellow workers.
All computers on a LAN can be assigned with three levels of access to your computer:
NetBIOS access (only for files and printers sharing between the LAN and your computer)
Trusted (all connection to and from the network will be allowed)
Limited Access to LAN (NetBIOS communications will be blocked, all other communications will be covered by applications and system rules).
So when you add new network address to the LAN settings you can assign that address (or network) with the access level mentioned above.
Please note that Outpost Firewall plug-ins are independent from the Trusted access level. For example, even if we add www.agnitum.com to the Trusted network addresses, Outpost Firewall plug-ins will still block banners, active content and other things from this site regardless.