Block a website for some internal ips and allow access to some


I am relatively new to comodo and found it amazing with all those powerful features.
I have a small LAN. Comodo is installed on the computer which acts as a DNS for all the nodes in the LAN.
I am trying to create a Network Security Policy where I can allow access to some websites to 2 of my lan nodes (i.e. and and block access to those websites for all the remaining nodes.

How can this be achieved.

The Source IP displayed in the logs is that of the one provided by the ISP and not internal (i.e. 192.168.0.x) hence the policy does not work as desired.

Please, any ideas/tricks highly appreciated.

Happy New Year to the community.