It is possible to filter the Calendar View by location in Owl.  First, make sure you have your practice locations configured properly.  You can find out more about configuring locations here.

In the Calendar View, on the top of the screen there is a drop down menu that allows you to select an individual location.  This configure your view to display only appointments assigned to this individual location.

Next, you can select multiple practice locations to filter your view under the Locations section on the left hand side.  The locations that have been selected will be the only ones populated in the Calendar View.

You can also change the location of a session within the Create Session view by selecting the practice location under Location.