Secure NDMP for NDMP data connections?

I see the following option in CDOT 8.3:

   vserver services ndmp modify -is-secure-control-connection-enabled {true|false} 

which is documented as enabling NDMP connections using SSL from port 30000.  

My question is: Is there any mechanism to do the same for an NDMP data connection in a 3-way backup/restore?

Thanks,

Mike