Screen sharing is a handy method of working with a remote Mac. You can use screen sharing to run apps or manipulate files. In fact, you can do just about anything you could do if you were actually sitting in front of the remote Mac.
So, when an About: Macs reader asked if it's possible to use more than one Mac to access and update their family's bookkeeping app, I suggested using screen sharing instead. This will allow any Mac in the home to access the app.
While some accounting apps allow multiple users and data sharing, most apps designed for personal accounting do not. An easy way around that limitation is to run the accounting app on one Mac, and use screen sharing to access the app from any Mac on your home network.
You do need to be a little careful, though. The accounting app (or any app you use with this technique) doesn't know there are multiple users. It's possible that you and a family member at another location could try to make changes to a file at the same time. Use screen sharing only if you need to access the app from a remote location, not to try to mimic a multi-user app, and you should be okay.