Neutral for Ge or intermatic light switches

I have a intermatic and GE (fan control) used as a Light switch in the same box connected to a addon for a 3way. First , am I able to use fan control to work lights?
Secondly am I able to share neutrals coming from a pig tail?
Finally , I have a porch light that is getting fed from the line side of the switch (Ge fan control) to receive its power.
Thx in advance.

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