Yes - if they're connected to a Neptune power bar outlet (EB832, etc.) Here's what I have configured for my skimmer:
Fallback ON
Set ON
If FeedA 000 Then ON
If FeedB 000 Then ON
If FeedC 000 Then ON
If FeedD 000 Then OFF
Defer 002:00 Then ON
If you want to automatically have it turn off when the pump outlet is also off, add this code above the first "If Feed.." line:
If Output < insert outlet name here > = OFF Then OFF