Filter results on the call page

Dear,

Sorry to bother you with a beginner's question, but on the call page, in Freedom UI, I can't filter the results by activity type.

I tried using business rules, but I can't figure out how to do this filter.

In each Result Activity Lookup, you have an activity category:

On the call page, all results are actually displayed on the Freedom UI.

So i go to the business rules but i didn't find how to filter the results with the call category.

I must be missing something

Thank you !
Nicolas