Edit access by checking the field? Is it possible to check the privileges for a particular field? For example, I have a field in the material field_access associated with the user who accepts an ID of the user. How to check access to edit the material through it? Currently editing is possible only if the user specified in the authors. 
(Google translate. Sorry for that)
Maybe you're looking for this module : Field Permissions


  The Field Permissions module allows site administrators to set
  field-level permissions to edit, view and create fields on any entity.