Not at this time, I do believe.
Some pretty fancy coding would be necessary to enable that future. I did read somewhere in this Forum about being able to create a Sub-domain or FTP account (forget which) that provides another Cpanel for them specifically, but dont' remember where.
All in all, subsidiaries of an account are still the responsibility of the account owner. Otherwise, might as well go for setting a new account and control WS & DT that way.