When issue is in "Closed" Status ONLY ONE group of users should be able to :
1. Modify/add attachments
2. Edit fields
3. Add/update subtasks
4. Edit issue links
5. Edit Traceability
No other user should be able to do any of these actions.
I have used the following workflow properties but users not in the jira-administrators group are still able to modify/add attachments

On using the jira.issue.editable=false property attachments were disabled but it was disabled for all users.
Please kindly point me to the correct property key and value