There’s a paid addon for that, so I won’t put a copy-paste solution as it would be unfair towards the developers, however you can edit the user roles capabilities yourself. I’ve created a ‘property manager’ role who can only access blog posts and properties, so the real estate agency employees can create and edit properties without accessing webmaster-specific parts or being able to break something; you can also specify if the user can only edit his/her own posts/properties or other users’ as well. It doesn’t take genius level coding skills, so it’s up to you if invest a few hours of work (or a lot less if you’re already familiar with wordpress roles and permissions) and write a simple paragraph of code, or pay the developers (they already gave wp-property for free, they deserve it).