As an admin, I want to disable internal and/or customer comments by role so I can:

• Ensure certain user groups cannot comment directly to customer (i.e. non-customer facing teams)
• Remove comments from certain request types (i.e. sub-tasks)

Original recommendation provided by Greg from GoDaddy.

"Let us choose whether the comment is on that transition screen at all (make it more like a field for our screens)
Also, let us control the split between internal and reply to customer in all scenarios
There are issue types, statuses, and transitions that only need to have internal comments in our workflow, so it would be great if admins can lock the public comment to our desire (let us lock it to certain roles, groups, statuses, screens, transitions, issue types, etc.)
Let us hide the comments from the full issue screen all together too (again by role, group, issue type all together)
We don't want people commenting on subtasks at all... we also might not want them commenting on certain standard issue types that were not created by the customer
We want to be able to have full control over the comments and where they live. We can always have people go to the portal if they absolutely need to write something public or we can just use automation to send emails in certain scenarios."

See: https://jira.atlassian.com/browse/JSDCLOUD-1733