As far as I know, you can only set the course visibility. 

We have the same issue where we have a course that we run for the different grades of lawyer.  We don’t want to create a new course per grade as 95% of the content is the same, but some of it is only relevant to each grade.  We just name the sessions after who they are applicable to and comms out that they must select the relevant level.

Won’t help with your scenario, but I’d be very interested to know if it is possible!

I’d also like to know if this is possible, so adding a reply to stay in the loop.

there is no way to do this as far as I know...we have a similar scenario and had to create course copies to accommodate our needs...The only other suggestion I have would be to utilize the Session names, descriptions and perhaps even the custom fields to create sessions that have your location names prominently displayed in the list of sessions (rather than just using the classic classroom locations)

I echo the others - this is not currently possible. I’m hoping that sessions get visibility and direct links in future enhancements - that would add a great deal of flexibility to classroom management and avoid having to create multiple courses to satisfy different audiences.

can someone confirm if this is still not possible with the Extended Enterprise module ?

...or somehow to reach the same result… (in other LMSes there are “catalogs” or “libraries” with which you can control visibility to different groups)

as mentioned above, the visibility rules are limited to what your catalogues show and and are set only at the course level...you cannot assign certain session to 1 catalogues and other sessions to another. There are ideas out there on this very topic so hopefully we’ll a version of this capability at some point in the future.