I have added this to Ideas here for those who are keen to upvote/support

Description:Introduce an option in Adobe Analytics Workspace filters (e.g., dropdown segments, panel filters) to enforce single selection only so users cannot apply more than one filter value at the same time. Why is this feature important to you:When users multi‑select from a dropdown filter or seg...

Thank you for your quick reply. Appreciate it. 

I have two segments I need added as a filter: One segment is for App and the other is for Web. These have specific criteria which is why they must be a segment. I would like to add a Filter at the top of my workspace project so that users can switch between the two. I do not want them to have the ab...