FTP - File Transmission Protocol

Can I create different FTP usernames and passwords for sub directories within my main account?
Yes, you can have many users and you can specify a specific directory for each user. You can configure the user and password through the control panel. Please verify your plan for the limitations.
Tips:
Keep your "Hosting Account Info Doc" as a confidential document. Better to take a printout and keep it in safe custody.

Further Reading