How to disable visibility one spot light on groom(only) or how how to set on only one object

Helo,
I want the light to shine only on the character’s face, but not on the hair. Plis help…

expl:
i have skeletMeseh inside are components: Groom1, groom2, Groom and spot light.
Spot light should be active only on SkeletMesh and groom (without goom1 and groom2)
Thank u for help:)