Allow individual metro app access through comodo firewall?

I need to allow one specific windows 8 store app to the exceptions in the comodo firewall. I have already confirmed that this is what i need to do to get it to work by changing metro apps to allowed application from outgoing only. The issue is I do not want to allow all apps to accept incoming. I only need it for one specific app. Is there a way locate specific apps to change those exceptions? I know the feature is available in the built in windows 8 firewall but i would prefer to use Comodo. For now I am just going to have all metro apps allow all unless somebody knows how i can do this. Thanks for any help.

Make a custom rule for the Metro apps you want to accept incoming traffic from and put it somewhere above the default rule for Metro Apps.