I would like to know if Composer could be in a multi-tenant mode. For example, if an user of an organization connects to the platform, he will only see his objects (identified with a tag for example) and the system objects. When he creates a new Thing, this thing will be automatically tagged with his organization tag. Of course, he won't be able to access or modify the things of another organizations. Have you got an idea how to do it?
Yes, you can set up different organizations within ThingWorx and then use the visibility setting for Things so that only that organization can see the Things associated with it's organization when you log into ThingWorx Composer. I don't believe there is any way to automate this currently.