You cannot share a project, meaning the edits and timeline.
To share the shots so someone else can use them for an edit, follow these steps:
1. Rt. Click any file in an event and select Reveal in Finder.
2. A finder window will open showing the clips.
3. Select the clips you want to copy or Command-a to select them all.
4. Open the server and create a folder for the clips.
5. Drag the clips into the new folder.
DO NOT DRAG YOUR FILES TO SOMEWHERE ELSE ON YOUR COMPUTER!
This will move the files and you will then see that Final Cut is missing a file. Final Cut does not follow where you put things, it just remembers where it put it when it was imported.