If you are looking for access control at the Recording Segment level, the user (supervisor) cannot have Recording > Recording > View permission, because it grants ALL recording content for the interaction it is privileged. You must instead be only using Recording > RecordingSegment > View with the appropriate conditions.
Access control transactional objects is the comprehensive article in Resource Center that explains the access control concept -- so make sure you have a detailed read on that.
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Director, Product Management – Recording and Real-time Supervision
Workforce Engagement Management (WEM)
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