Workfront Security level on updates section - Add private comments

Description - It would be great if we could add an option of security level, and add comments where only certain group of users could view to updates section on tasks and on proofing workflow.

Why is this feature important to you - To increase the comments security in between departments.

How would you like the feature to work - That I could add a private comment to certain grupo or users on the tasks, project and proofing updates/comments.

Current Behaviour - If is the same proofing workflow or tasks, users can see all comments.