In the case of a CAMO with maintenance organisation approval, can Part 66 licensed

No, as their independence would not be guaranteed.

AMC1 CAMO.A.310(a), paragraph (e), of independence of the PRA from the airworthiness management process. 

A CAMO with a maintenance organisation approval may nominate personnel from its maintenance organisation as airworthiness review personnel as long as they have not been involved in managing the airworthiness of the aircraft. In order to avoid a conflict of interest, these personnel should not have participated in the commissioning of the aircraft in question (except for maintenance performed during the physical inspection of the aircraft or carried out as a result of discrepancies found during such physical inspection).

NOTE: This independence requirement does not exist in the CAO Party, so the certifying staff of a CAO organisation could.