Adds a (CCK) field type for referencing user roles as a field in (CCK) content types. Also has Views, Content Migrate, and Field Extract Values integration.

Fortunately, Drupal 8 is not needed. It is possible to build references to the role using core fields.
You can read how to do this here -

Supporting organizations: 
Upgrades for Drupal 5-7
Maintaining issues queue

Project Information