Your hosting server must support Server Name Indication (SNI) to do so.
Until recently, multiple SSL certificates could not be installed on a single IP address, so if you had virtual hosts to host multiple domains from a single IP, you could only install one SSL certificate.
You can now include the hostname with SNI when passing information on an SSL verification check. Doing so allows a single IP address to support multiple SSL certificates.
Before going this route, check with your hosting provider to ensure SNI is supported.