Use Case: SDR books a meeting for an account exec and needs their SF User ID populated on the event/Lead/Contact. Only option in a flow is for the assignee. Requesting to have the booker as an option for ownership nodes.

There is no way to assign ownership to the booker. In Orchestrator, there is a reference to the booker ID but that is the CP ID and not the SF ID so it does not update the salesforce records.