Prevent a certain issue from being reopened after seven days closed, unless user has the role of "Administrator" or "Supervisor".
Add the Logical validator to the desired workflow transition.
Add the following expression:
%{issue.status} = "Closed" AND {system.currentDateTime} - {issue.lastStatusChange} > 7 * {DAY} IMPLIES isInRole(%{system.currentUser}, "Administrator") OR isInRole(%{system.currentUser}, "Supervisor")
Logical validator
Logical condition