Scenario:
The Web TimeSheet administrator has created timesheet users who will be entering time against projects/tasks. He would like to disable a few timesheet users from viewing task progress in their timesheets. All the users have Project Resource-Billable permission enabled in their user profile.

Resolution:
Create a new permission profile based on Project Resource-Billable permission profile. Disable the permission entry Show task progress in timesheet under Timesheet permission. Save the permission profile and assign it to all those users who should not view task progress in their timesheets and disable the permission “Project Resource-Billable” for these users.