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JSU Add-On User (default): The Perform as JSU Add-On User has all the necessary permissions to action all of your JSU post functions. If you don't specify a different option, the transition on the related issue is performed as the JSU app user with its associated permissions. This option is useful for testing, and you can confirm the action in your issue activity.
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Choose User: Use this option to specify a different user account that has been granted the necessary permissions. Usually, this user account is assumed to be only technical (impersonation), with broad permissions, and not used to log for logging into Jira by any coworkers.
In combination with the Permission Condition in native Jira, or the User Is In Any Users Condition from JSU, you can hide a transition from all users that do not have permission to execute it.
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