Yon can set a password for a print job so that it starts printing only after entering the password on the printer's control panel.
On the printer driver's More Options tab, select Confidential Job, and then enter a password.
Set the other items on the Main and More Options tabs as necessary, and then click OK.
Click Print.
To print the job, select 
and then Confidential Job on the home screen of the printer's control panel. Select the job you want to print, and then enter the password.