The proper term is collaboration, which for some reason isn’t supported by pretty much any content creation software.
The closest I got is to have all of the assets in Dropbox, so that every time an asset is changed, it’s updated automatically for everyone (the editor will automatically refresh assets when it detects they were changed in the file system).
This still doesn’t let you to change the same assets at the same time, but it does make it easier to collaborate.
If you are going this way, make sure to use links for your content directory, rather than sharing the whole project, because the later will mean you’ll also share all the local build files, which are big and useless for your teammates.
See this - YouTube