If you don’t control your commander as the lieutenant ability resolves, you won’t get its effect.
2018-07-13
The lieutenant effect happens only once each combat, even if you somehow control multiple commanders (perhaps because you have two commanders with a partner ability from the Battlebond™ set).
2018-07-13
If you have multiple commanders, you need to control only one for the lieutenant effect to happen.
Menace (This creature can't be blocked except by two or more creatures.)
Lieutenant — At the beginning of combat on your turn, if you control your commander, each opponent loses 3 life.
