It is good idea to launch specific program (e.g. dispatcher) when some workrave action are executed. Like : microbreak started, break started.
Purpose is to send notification to mobile device to show list of tasks, whose I can do while I am away from computer (like show reminder to call mom).

I see it like a config parameter with path to executable, and argument format : 
c:\\program.exe /action=%s

Where %s is expanded to what action is executed.