Referencing Perm Levels in "Read Only Depends On"

ERPNext
,
1

In the Customize Form, I want to configure the form so a field is:

  • “Read Only” when their Perm Level = 0
  • Not “Read Only” when their Perm Level = 1 or higher

Using the Perm Level field in the customize form only controls the ability to view the fields, but I want the ability to selectively make the field “Read Only” base on Perm Level. How can I achieve this?