Another door is opening as an area is being captured but needs to close ifI guess you want the door to open while players are in a specified area like trigger_multiple, and start closing when there's nobody at this area. As far as I know you can do this only in Source.
capture fails.
What about closing a door/activating an entity when the specified team wins... I've never mapped for DoD and never played it so I can't help you with this. Maybe it's even impossible without coding.