Independently required filed

Hi, I think it can be done by writing hook for a particular registration page and inside the hook to add condition to show/hide particular field for certain role.

Thank you for the suggestion Samir, but:
1) The module already does what you're describing (it's specifically designed for that).
2) My request is not about showing or hiding a field, but about making it mandatory or not on different forms (using the same field).

I apologize; so far, I had only inputted one role. Upon adding multiple roles and, consequently, more forms (one for each role), I just now realized that what was requested already exists.