How to tell if someone has a "lock" on a Task

I have a dashboard-like page that contains a grid with a list of all outstanding tasks.

One of the columns in display is 'Task Status' and my aim is to distinguish the tasks that are currently being viewed/edited by someone. Since Appian OOTB status values don't provide such distinction (e.g. "In Edit"), I'd like to know if anyone has experience in implementing said capability or can offer pointers on how it can be done, if possible.

Thanks in advance!

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