[feature]: Constrained member picker custom work item property

Is there an existing issue for this?

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Summary

We have some custom work item properties that use the "Member picker" to select a user in the project. However, we'd like the ability for a specific property to instead show a subset of the project members.

So as an example, I have custom work item property "Author" that has all the members in my project "Annie", "Cathy", and "Tom". However, I have a "Reviewer" work item property I'd like to assign to only a custom subset of users "Cathy" and "Tom".

In a perfect world this could be linked to a google workspace active directory group or the like, but at a minimum we would have the ability to create a custom list in plane of specific users and give it a tag that I can attach to a custom property.

Why should this be worked on?

The number of users in the project can be large, and being able to constrain to a subset allows us to limit certain fields for clarity of use.