See also: Edit Modify Rights, Restrict View Rights at Organization Level, Restrict Modify Rights at Organization Level
You can enable view rights to view the data or
disable to hide the data for specific security
role, at tab level for any work item.
Steps:
Open any work item.
In the workspace, right click specific tab to which you want to restrict access for a specific security role.
Click Edit Access Control button.
In the Edit Access Control dialog box, beside specific security role, in the view column,
To enable view rights, click until symbol appears.
To disable view rights, click until symbol appears.
Click Save and Close.