As mentioned before, you can give multiple users read/write permissions,
like the following image shows three different users controlling a separate output port.
status-menus.jpeg

 This script is written in BASH and displays the I/O status of the pins. You can simply change an output that you have
permission of, by typing the number of the pin and hitting enter, then either a 1 for on or a 0 for off and hit enter.
 Also should be noted that you may allow remote connections, which in this case,
people around the world could work together on a project.