Yes, depending on your hosting plan. Most PassoCloud plans allow you to host multiple websites under one account by adding addon domains or subdomains.
To add another website, log in to cPanel and open the Domains section. Click Addon Domains, then enter the new domain name and document root. Upload your website files into the folder created for that domain.
If your plan does not support multiple domains, you can upgrade easily from your client area or contact PassoCloud Support for advice.