We are two people who need to edit on the same layer in QGIS. For example one of us will edit locally, the other one via a server connection.
For simple use with not too many features, there is a useful tool called GooGIS which is a plugin to QGIS. The data is held in Google Drive, you login and authenticate by your Google Account. It manages edits on a per row basis apparently. It is a little buggy to get running, esp on Windows, but might meet your needs perfectly. https://plugins.qgis.org/plugins/gdrive_provider/ and https://github.com/enricofer/gdrive_provider