Field Hide App helps to hide the custom fields based on simple rules without writing any script and JIRA configuration. User does not need to edit the existing field configuration. It hides the custom fields on create, edit, and view screen-based on the published rule.
Login as JIRA administrator. Go to -> Administration -> Manage apps -> Find new apps
Search “Field Hide“ and click “Install“
Hide Custom Fields
Follow the below link to hide any custom fields base on user rules(groups/roles/users)