CSF open port :- You can open a port for just one specific user in CSF by doing the following:
csf -a "tcp|out|d=5353||u=656"
Replace 5353 with the port you wish to open and 656 with the UID of the user.
Opening an outgoing Port for one remote IP
csf -a "tcp|out|d=7989|d=216.220.59.211|"