Leads allows you to choose which leads an employee can see:
Assigned leads only allows an employee to see the leads in which he or she is assigned as a manager
Work Orders allows you to choose which work orders an employee can see:
Assigned orders only allows an employee to see the work orders in which he or she is assigned as a specialist on the General info tab.
Payroll Report allows you to choose what information an employee can see on wages:
only his/her wages and their breakdown
information about the calculated wages for all employees.