MultiIndex with one RefinementList

Hello, I’m looking for a way to refine a MultiIndex together in one RefinementList. Is this possible?

Here my example:
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I got a Product, which has an owner object inside. An owner lives in a specific country. I want to refine the products by country in this way.

I also want to show matched Owners in a MultiIndex for this search. So I need that the RefinementList is applied to both indexes and that there is a mapping between product.owner.country and owner.country.

Is this somehow possible to get a) RefinmentList over multiple indexes combined and b) relate the same attributes of the indexes.

Thank you!