Hello.
In the Booking Calendar Free version exist only one default calendar, and timeslots relative to days only to this one calendar.
1) In case if you need to have the different calendars relative to different WP users, then the ability to have independent calendars possible in any paid versions of Booking Calendar. Check more here https://wpbookingcalendar.com/overview/#booking-resources
You can watch video overview about this feature here https://wpbookingcalendar.com/help/multiple-calendars-video-overview-of-booking-resources-in-booking-calendar/
Please read firstly the general instruction about usage of paid versions of Booking Calendar: https://wpbookingcalendar.com/faq/general-usage-instruction/
You can create the different booking resources (your properties or services – unique calendars) at the Booking > Resources page and then you be able to insert booking forms for each of your booking resources into the posts or pages. Please read more how to insert and configure the booking shortcode into the post or page here https://wpbookingcalendar.com/help/inserting-booking-form/
2) If you need to have the different timeslots configuration for different calendars (booking resources), then it’s means that you need to configure several different booking custom forms with different timeslots. It’s possible in the Booking Calendar Business Medium or higher versions. Check more about this feature here: https://wpbookingcalendar.com/overview/#custom-forms
Watch it in this video guide https://wpbookingcalendar.com/help/custom-booking-forms-video-overview/
3) In case if you need to have fully different/individual booking admin panels for different WP users, then you need to check the Booking Calendar MultiUser version.
In Booking Calendar MultiUser version possible that each registered WordPress user (your owner) have own individual independent booking admin panel, and can see and manage only own booking resources and some other settings (other owners will not see the bookings from this owner, they can see only own bookings). Please check more here (at bottom of the page) https://wpbookingcalendar.com/overview/
Also each owner (user) will receive the emails about the bookings of the own service(s) or property (booking resource(s)) and can approve or decline them. Please note, that the each owner WordPress user) will have different individual calendar(s) with booking forms in the separate pages. Please retest it in the live demo. You can read more about the initial configuration of the Booking Calendar MultiUser version: https://wpbookingcalendar.com/faq/multiuser-version-init-config/
Watch it in this video guide https://wpbookingcalendar.com/help/multiuser-video-overview/
Please test the live demo of Booking Calendar Multiuser version here: https://multiuser.wpbookingcalendar.com/
Admin Panel of Multiuser version (here you can test several admin panels functionality): https://multiuser.wpbookingcalendar.com/admin-panel/
Kind Regards.
