At present you can define your custom contact matching strategy for marketing forms but for an Event you can only choose one of the three matching strategies: email, first & Last, and email + first & last. We would like to be able to use the contact matching strategy we've defined globally, including in our event management.

If we can't define it in a completely custom way then we would like email + last name as an option, so that preferred name/legal name issues do not arise as much.