Is there anyway with your device to block LAN IP from LAN IP? 'Rules'?

No, there is no way to block LAN IP from LAN IP, this is not possible since both LAN IPs communicate directly with each other without passing through the firewall. Even if it passes through the firewall, the RF550VPN does NOT have this capability, however the RF600VPN and RF660VPN has this capability as long as the LAN IP is going through our box.