"Hunters for Hire" isn't a Magic keyword or ability—it doesn't appear on any cards or in the comprehensive rules. You may be thinking of something else, so let me point you toward likely candidates.
If you mean "Hire"-style effects, the closest real mechanic is "Mercenary" creatures or the "Goad" mechanic, where you force an opponent's creature to attack a player other than you. Goad is hugely relevant in Commander because it weaponizes opponents' boards against each other in multiplayer games. Alternatively, you might be thinking of "Myriad" or temporary "gain control" effects like Act of Treason.
If you can share the exact card name or the reminder text printed on the card, I can give you a precise rules breakdown, the common misplays, and how it performs across a four-player Commander pod.