At the moment, the Hotel Booking plugin is not created for the multi-vendor system.
Nevertheless, the owner accounts are on our feature requests list. Please, feel free to leave your upvotes for this feature here with your ideas and we will notify you as soon as the multi-vendor feature gets implemented.
Since for now, there is not a ready solution for multi-vendors, you may try using third-party plugins in order to create different accounts for every vendor and add the functionality you need. Unfortunately, we have not tested any third-party plugin for this purposes yet in order to recommend you one, and cannot guarantee the result to be successful.
Nevertheless, we are open to your ideas and wishes. Do not hesitate to leave your comments here, we will be happy to consider each of them.