Group Registration Form
You can create registration form for every group in your store.
Create new web-form with additional fields you want to see on registration page. Note that fields like First name, Last name, E-mail and Password are added automatically to the form as they are required by Magento core to register customer.
Go to Customers > Customer Groups and click on the customer group.
You will see additional block of parameters.
Select desired web-form for registration.
Create new CMS page and embed group registration form in it using widget Web-forms: Customer Registration Form.
Click here to read about how to embed web-form in CMS page.
- Publish link to group registration page somewhere on your site.