A printing apparatus including a reception unit configured to receive print data, a first identification unit configured to identify user information contained in the received print data, a first determination unit configured to determine whether there is any user currently logged onto the printing apparatus, a second identification unit configured to identify user information corresponding to a currently logged on user, a second determination unit configured to determine whether the user information is identical, a suspending unit configured to suspend print processing when the user information are not identical to each other, a printing unit configured to print the print data when the user information are identical to each other, and print the print data in response to a log-out action of the currently logged on user when the print data is suspended by the suspending unit, and an inhibition unit configured to inhibit a log-in action based on different user information.