can we have different lightmap for different prefab ?

Hii..

I have single scene in my fighting game. I am loading different stages prefabs . Now i want different lightmap for different stages.

I tried but lighmap overrides previous lightmap.

How can i have different lightmap for different prefabs/stages ?

Is it possible to have more than one lightmap in single scene ?

If anyone knows about it then please help me.

Thanks.