Network operations controller is not the same as a flight dispatcher.
In short...Flight dispatchers plan the flight from beginning to end, looking at route, wx at dept/arr points and en-route, review all related notams, planning fuel, applying MEL's, calculating RTOW and a whole host of other things depending on the type of operation and aircraft.
Network Operations controllers on the other hand tend to have control of the overall picture of the 'day of operations'(although they are sometimes involved in the dispatch of flights and in some companies the flight dispatcher is the operations controller too). They assign tails no's, communicate with outstations, control movements and airport slots, management of schedule disruption is a big part of it and they generally keep a watch on the overall progress of the flight schedule looking for potential problems, not focusing on one particular flight per se.
That's a very brief description of both roles, as I said, in some companies the lines are a bit blurred.
Sometimes the flight dispatchers calmly change shifts on sunny days while the ops controller is tearing his/her hair out with a raft of AOG's
D.O.G