Extension: Access Control
Description
Add conditions to control access to registration form. For example, allow users within specific age group, with secret passphrase and/or User Role to fill out forms.
WordPress Registration Plugin
RegistrationMagic Silver
Notes
This extension is part of RegistrationMagic Silver. Note that RegistrationMagic extensions are part of bundles; extensions are not available (or sold) individually.
Link
Access control extension is available here.