Filter on Repeated Join Table

I have copany list, where i have two databasejoin fields.
One databasejoin to a country-list is not repeated.
The other databasejoin to a category-list is repeated. (I have companies with multiple categories)

With this url i can filter out the companies in a country:
?company___country_id[value]=Switzerland&resetfilters=1
this works fine.

But how do i filter the repeated category list?
?company___categories_id[value]=Sport&resetfilters=1
doesn't work.
 
We are in need of some funding.
More details.

Thank you.

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