Hide Billing Rate for Time Ticket Entry?

Hello. Is there a way to suppress/hide the Billing Rate of an Activity Item during Time Ticket entry? Employees enter their own Time Tickets using Jobs and Activity Items. We have a use case where we want the Billing Rates to be set to employee's hourly pay, but we don't want any employee to see other employees' rates? Since there doesn't seem to be a way to limit employees from selecting other employees when entering their time, this exposes the Billing Rate of one employee to another. Any solutions for this?