Is there a way to do oneway wires for MV and LV?

just curious if there is a way, to prevent situations where i want an APC to charge from one source but not have it charge the rest of a network.
if not, is there a way in the works?

Yeah this isn’t really possible in the game right now. The closest you could get is using a JRPACMAN to power the APC’s LV network directly instead.

APC is connected to a network using MV cable that’s placed directly on the same tile. You can physically cut this MV cable from the rest of the network and connect your power source (pacman generators) onto the MV cable if a JRPACMAN is not enough or is too annoying to use.

In case the source (singulo, AME, tesla, solars) doesn’t interface with MV cables you can first connect it to a dedicated substation using HV cables and then into your APC MV cable from the substation.