User filters are a special kind set on Tableau Desktop. They link Tableau Server users to dimension values. It's quite easy to create a user filter:
- On Tableau Desktop, click on the Server in the top menu, go to Create a User Filter, and choose the Field to secure.
- Tableau opens a new window where you can select, on the left, a User or a Group and, on the right, the Members of the field that the user or group can see.
- Once you've created the user filter, you'll see a new set in your data source.
- To use a user filter, add the corresponding set to the Filter shelf or, better, as a Data Source Filter (with the Use all option).