ring-fence

verb
1
to protect a particular sum of money by putting limits on it so that it can only be used for a particular purpose
حفاظت مالی, منحصر کردن بودجه, محدود کردن استفاده از بودجه
2
to protect something by putting limits on it so that it can only be used by particular people or for a particular purpose
محدود کردن, محصور کردن
All employees can access the parts of the Intranet that are not ring-fenced.