Following options are supported for attendee lockdown feature.

Attendee Networking - Set opt-out by default for all attendees so they will not be visible in the attendee list. They have an option to opt-in to chat / network with other attendees during the event.

Private Events - For private events you can restrict the number of attendees and only those attendees can access the event information via secure password.

Anonymous Login - You can have one default anonymous login for all attendees or subset of attendees