Firewall Configuration

Hi, im using comodo firewall free edition for my network, not personal but office network, medium sized network, i was trying to configure the firewall so that my pc networks and only that pc networks could see this machine, i need a bit of expert advertise because i got one chance only to make it work, so i was trying to make firewall rules by ip, making 2 rules incoming and outgoing from this machine to each other machine im monitoring, making just a rule so i can remote desktop that machine from my own and one application rule for VNC viewer and for my monitoring software, question is: Should this work? one incoming rule and one outgoing rule from and to, should i make another kind of rules? Im only pinging by the way to the other machines.

Thanks so much for the advice!!!