How to configure action on role basis?

We have five exit types: Resignation, Voluntary Retirement, Superannuation (Retirement), Termination and Death

Where we need employee to choose only Resignation and Voluntary Retirement as an action while submitting Resignation. Line Manager to choose only Death as an action while submitting Termination for any of his direct report.

But when we are logging as a line manager and going to terminate any of his direct reports > we are able to see Resignation, Voluntary Retirement and Death (3 actions). Whereas our requirement to see only death as an action from LM. This is happening because LM is also having employee role tagged as well.