Our "Reviewers & Approvers" DO NOT WANT the "PLANNERS/PROOF OWNERS" to be able to comment, when the "REVIEWER & APPROVER" has checked out an item on their name. Has any other Workfront Client faced a similar business requirement.

[JuhiKa]

The Proof Owner should not be able to comment for the duration: the item is checked out to the timestamp the item is checked back in. The Proof Owner should be able to comment before or after.