To restrict an FTP account to a single subdomain, follow these steps:
- Create the subdomain if you haven't done so already.
- From the main control panel menu in "Account Manager" click the "FTP Management" link.
- Click "Create FTP Account" button.

- In the "FTP Username" field, enter the subdomain name (without .yourdomain.com).
- Enter a password in the password field (random password is strong and recommended).
- Select the "User" radio button.
- Click the "Create" button below.
Note: You can find more information about FTP accounts here.
