Limitations
When a JSM customer creates a request, they cannot add organisations to it.
The request view doesn't show which organisation(s) the request is shared with.
Possible workaround
JSM customers can view all the organisations they are a part of as well as the requests shared with them via those organisations.
Go to the avatar menu > My Requests
Change the filter Created by me to Shared with my organisations.
Note that this only works if all the service desks linked to those organisations have been added as projects into your Refined site.
What we are doing to solve these limitations
We are in continual contact with Atlassian to improve the APIs. To track the status, see the Atlassian tickets. Please vote or comment on the tickets that are related to these limitations, so that Atlassian can also hear your feedback.