Completely Restricting Timekeeper Access

How do I restrict timekeepers seeing other timekeeper's info? We would prefer that timekeepers only access in Timeslips is to enter their time. We don't want them to be able to look at other timekeepers time or really do anything else in Timeslips. Is there any to completely lock down what they can see and do within Timeslips? I looked at the Security Profile but it is not clear on how to do this.