User Login Requirement in WP Fluent Forms WordPress Plugin
Enabling WP Fluent Form’s User Login Requirement functionality will make sure that only your registered users will be able to fill up a form, and not others.
- Go to Settings & Integration of the form you want login requirement enabled.

Go to Form Settings>Scheduling & Restrictions

(scroll down)

- Toggle on “Require user to be logged in”
- Define the message to be shown to your unregistered/logged out users.

- Save Settings.