6.1 or 8.X --Securing Labor Entry

We have a new Controller who is asking me to pose these questions...

Is there a way in either 6.1 or above to control who an individual
supervisor can see/edit in labor entry. As far as I can tell, if a
person can get into Labor Entry they can see/edit anyone. It would be
nice to limit a supervisor to only their subordinates.

If it isn't securible per supervisor, how do other companies handle
Labor Editing in Labor Entry? Do you keep access to it very limited
and have supervisors turn in paper edits to be modified in Payroll for
example, or do you trust individual supervisors to make changes?

Thanks,

Brian Stenglein
Clow Stamping Co.