Filter a collection based on data from a dropdown-menu

Hi Webflow people

I am building a website with a standard presentation of employees pulled from a collection. Every employee also have different specialities attached to them. Thees are pulled from a different collection as a multireference… all working fine.

In the top of the site I have a dropdown-list pulling all theese different specialities (pulled from the collection) But now I like to make it possible to select a speciality from the drop down menu and only have the employees shown with that specialty… How do I do that?

Thanks in advanced

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