Can i empowered any with Sanction

Yes — but only a unit, and only one that isn't already Empowered.

Sanction's mode 1 ("Empower a unit. Disempower it at end of turn") isn't restricted to units you control, so it can hit any unit on the board — yours or an opponent's. It can't hit gear, legends, or battlefields, since the text says "unit."

If you point it at a unit that's already Empowered, the Empower instruction does nothing (Rule 441.1.b–c) — the choice is still legal, but you gain nothing immediately, though the delayed "disempower it at end of turn" is still created and will fire (that's the same independent-delayed-ability behavior FAQ #12470 notes). For an actual Empower event, pick a unit that isn't currently Empowered.