It is possible to assign a ticket to a specific target group: one or more lists from the registration overview are linked to a specific ticket, eg. a (free) VIP or partner ticket.
In that case, the ticket will only be available for invitees on the selected list(s). The ticket will not be visible to other invitees.
This is how it works:
Import a contact list to the registration overview (Registration Module).
Create a ticket in the Ticket Module.
Choose the option 'Link ticket to specific invitee list' and select the appropriate list(s).
Check that it works now, by adding yourself to the list and checking that you see the correct ticket.