From the Advanced tab, click Continue (located on the right).
Click Port Filtering (located below the Advanced tab, to the right).
From the Port Filtering section, click the switch to turn on or off.
From the Applications section, select the desired app(s).
Selected when a check mark is present.
If the app is not listed, click Add Custom Application (lower-left) then enter the appropriate info.
If turning off Port Filtering, skip to step 7.