There is disclosed an apparatus including a node with a processor, a communications interface, and a computer readable memory that has other and a space time modules that enable space time region based communication if space time region based criteria are met. There is disclosed a method with steps of: providing an interface; determining if a space time region based criteria is met; and enabling communication over the interface if the space time region based criteria is met. There is disclosed a user interface method having the steps of: providing a view that controls objects rep resenting a spatio temporal information related to a space time based communication rendered on the interface; and displaying information on the user interface in relation to the space time region based communication if a space time region based criteria are met.