Please assign product/category rates per affiliate

I need to assign a very generous rate for a category of products to a specific affiliate. I have a handful of people helping me launch my online courses. I need to offer them 40% commission on these courses. But I cannot afford to offer them 40% off all other products in the Woo store.

I see that you can setup an affiliate with a rate across all products (default, %, flat, or group).

And I see that I can establish a standard rate by product or category.

Is it possible to add the same code selecting product / category to the individual affiliate? Or group?

This is quite important because allowing lifetime 40% commissions for all products to these affiliates will bankrupt me.