LAN Only

Comodo Firewall offers us rulesets like Allowed, Blocked, Outgoing Only, etc. What’s the best way to create one for “LAN Only”, that allows an app to have “Allowed Application”-like access for LAN and “Blocked Application”-like when trying to reach out?

You would create an allow out rule with the destination address being the IP address range of the LAN, then create an allow in rule with the source address set the IP address range of the LAN, and finally create a block In/Out rule with source and destination address set to any. You would set the protocol for all three rules to IP and leave the IP details tab set to any.