Coupon Code only for 1 product attribute

Hello guys,

does any of you know how we can allow coupon code to be used only for 1 product attribute.

e.g. Product "Service"

Product Attribute A
Product Attribute B
Product Attribute C

Coupon code can be used only on Product Attribute C ?

Thanks

Edit: nop 3.80

This will require customization.  For 3.80, You can probably modify the "Had purchased one of these product" discount requirement rule.  (You'll also need to adjust the "had purchased" to instead look in current cart.)