How to restrict Assignments Line Manager to view or edit Time entries of other assignment

Summary:

Employee has two assignments E123 E123-2, each assignment has a different line manager. Employee enters their hours worked across each assignment in a single Time card. We need to restrict Primary manager to view or edit Secondary assignment time entries and vice-a-versa. How do we restrict line managers access in this case

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Version (include the version you are using, if applicable):

25B (11.13.25.04.0)

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