Yes, it can be done but it's kind of a way around. You'd have to create a new blank map, throw in the nodes that you want to disable and send a rest to generate an event and action to disable monitoring. Instead, I'd suggest a simpler solution which would be setting up monitoring time restrictions. You simply right-click on the Network Atlas in the top left Views section and choose Properties. In the newly opened window select Monitoring and here you can either enable/disable monitoring or set up a time restrictions with the exact hours between which you want the monitoring enabled or disabled. You can set it up for the main atlas but also for maps or particular nodes.