It would be good to have consistency with the 'Receive Mouse...' interaction and add a 'Receive Mouse Clicks on Layer' node. Likewise the 'Receive Mouse Moves' should also have a corresponding 'Receive Mouse Moves on Layer'.
One use case might be a window which contained controls (buttons, sliders, etc) and visual I/O (input/output) layers with mouse interaction restricted to the the I/O layers.
At the moment I can't target mouse moves to a specific layer.
Would be helpful in avoiding Process List when having to do math (Add Lists, Multiply Lists, Calculate List) on multi-D lists: the results could simply be integrated as new Ds in the original point or list.