Multiple Calendars
From DAViCal Wiki
To create more than one calendar with a single user depends on the client you are using. With Evolution, for instance, one can simply add a new CalDAV calendar using the URL "caldav://<server_name>/caldav.php/<username>/<name_of_new_calendar>". DAViCal will automatically create the named calendar, provided that you login correctly.
With other pograms, such as iCal, SOHO Organizer and Mulberry, the software provides a UI to allow you to create a new calendar. These should work fine, since DAViCal does implement the MKCALENDAR command that these clients use.

