First, post whether you know Unix/'Linux CLI'.

You won't find unless you use grep in CLI. Then make a script with 'do while' to call nmap every 500 millisecond with sleep. Then you will see what is changing in real time.

I guess you know, but if you are not from unix background, then use gnome-nettool.

No direct process name, but the two info can be correlated. Find which ports are used for what purposes. You will understand.