You can set the user’s role according to the field selection. For this, you will need conditional logic premium add-ons. For more details, please check the following links.
Assign role conditionally according to field selection: https://docs.wpeverest.com/user-registration/docs/how-to-conditionally-assign-user-roles/
Conditional logic add-on: https://wpeverest.com/wordpress-plugins/user-registration/conditional-logic/
According to the WordPress Support community guidelines, we can not discuss premium features here because this support forum is for free plugin users.
If you are interested, please check out https://wpeverest.com. You will find the live chat option to contact our support representative.