Different price breaks for Different customers for the same Usage item on a Service Contract

Hi,

I have a a single price list with price break defined for usage of B/W and Color.

I need to charge different customers different rates for B/W and Color on the same Service contract.

Can I achieve it my overriding price break defined on price list at contract usage subline level? If not, can you let me know what the possible alternative would be?

Thanks,

Nitin