The Booking Calendar MultiUser version have 2 types of the users: super booking admin and usual user.
The "first" WordPress admin user by default is "super booking admin" user.
So, firstly after activation of the plugin you have to see the booking panel for that user.
Then you are need to open the "general booking settings" page (this page is available only for the super booking admin users), then expand the User settings section at the right side and set the correct permissions (user roles) for the pages of the booking admin panel. Its required for the new wordpress users possibility to open the admin booking admin panel.
Now, you can create new wordpress user (the role of this user have to be higher or equal to the roles, which you are set at the previous step).
Now, you are need to open the Booking > Settings > Users page (you are have to be logged in as booking super admin user) and make activation of the booking admin panel for the new wordpress user.
Finally, you can log in as new wordpress user, and you will see own booking admin panel for this user. You can create new booking resource(s), configure the settings and insert the booking form(s) of this user into posts or pages, which is created by this user.