Not really, it is in general still allowed to take someone on the flight deck, but with DuiHuiLui itīs only used for company travel and very restrictive.
In FAA land the only people allowed on freighters are government employees (FAA/NTSB/military) flight crew members, company employees required for the safe operation of the aircraft (Maintenance/Loadmaster), couriers with a FAA 8430 form or FAA certificate holders with the authorization of the PIC and company.