Hello,
I have searched the forum to see if someone had the same problem. I've only seen people getting this message with Illustrator and some plugins in Premiere.
However, I get the pop-up within After Effects, when I use the CC Cineware plugin to load a C4D scene in my comp. Every time I enter the comp or want to render it, I have to allow Cineware incoming network connections.
This is quite annoying and I would want to have after effects or OSX remember my choice!
I couldn't find a solution in other threads, so I hope someone has any ideas here!
Do you experience the same message when using Cineware? Which is an awesome addition to After Effects, by the way 
thanks!