Sub Menu should be invisible.

Question

Hi,
  I wanted one of the sub menus should be invisible to customers where as they should be visible to employees.

  Customer entered all his details.I am planning to have a view report so that he can view his details.For this i am planning to use grid view.But grid view displays all the table data.Here a single customer can view all the customer details which shouldn't be happened but the employee should be able to see all the customer details.So i am planning to make the sub menu to be invisible to users and the other thing is that if i wanted to get a report of a single customer how to do that?

Sita.