Hi,
The client machines do not run any python code, so displaying dialog boxes and opening files won't affect clients. The clients only execute commands that could potentially affect the rendering environment.
If you wanted each client to have its own viewpoint then you first need to disable the "Transmit mouse navigation" in the cluster master utility. Then, during each frame you would do something like this:
Code:
viz.clustermask(viz.CLIENT1)
#Set viewpoint position/rotation for client 1
viz.clustermask(viz.CLIENT2)
#Set viewpoint position/rotation for client 2
viz.clustermask(viz.MASTER)
#Set viewpoint position/rotation for master
viz.clustermask(viz.ALLCLIENTS) #Restore cluster mask
The cluster mask simply controls who will receive the commands. It is a state variable, so once you set its value, all subsequent commands will use that mask.