Eventbrite API Show only one ticket type when user is logged

Hello, I’d like to kwnow if it’s possible to show only one type of ticket in the eventbrite_ticket_form_widget on wordpress using you API.
I’ve got a client who sell tickets to usual customer for events but who also have free tickets on the same event, for its members and I can’t find a solution to show only free tickets for members and others to none-members.
Thank you for your help and excuse me for my english, I’m french.

Olivier