What's the scope of the Force Net Update node?

Someone just tipped me off about the existence of this node yesterday and it seems to be working great and part solves a problem I had.

At the moment I have it placed just immediately after the Pawn’s ‘tick’ node but I would like to get a bit more precise with the useage as it is only a select handful of variables that need the increased rate of replication.

I can’t find much documentation on the node.

Does anyone know what the scope is of the node?
Does it affect all variables changed after the node placement? Can I restrict its effect to inside a function for example?