Folks,
I had been asking questions for few things around this... Basically lot of new things for me ( App, System Extension, Cocoa, Swift and all other things related to Apple App related stuff ).
Finally got the hang of it, and I was able to get the Firwall extension going with a separate thread for the TCP listner ---
Now time to get the XPC going, which would be really low latency, and more secure Message IPC !!
Thanks,
PRokash