Automatically lock active stages for certain users

[#1]

We would like the ability to Automatically lock all active stages in a Workflow when a user who has the Email Alert of Decisions makes their decision on that proof.

Current example is we have Project Managers and Stakeholders who are connected to different proof stages on a document, the Project Manager should be allowed to make the final decision, even if no user on the Stakeholder stage has made their decision causing the active Stakeholder stage to be locked.