On the Polycraft World Portal, you can select the setting button next to any private property and control the user permissions on that property. In addition you can set the Master World, which determines which production server (Lithium Server, Beryllium Server, etc.) or which beta-testers server (Helium Server, Hydrogen Server) is your main world. Note, you can only perform most functions on your Master World. Other worlds default to a base set of allowed properties.