Of course! Invite your colleagues to participate. No strings attached! You can all set this up including multiple users connecting to a shared database as part of the free Limited edition to be sure you are happy with it before you purchase any licenses.
Add users at any time by installing SpinOffice on additional client PCs or Macs and go to menu option New -> Invite colleagues to invite them within your database. The user instantly receives the invitation inlcuding the details how to get access.
The Pro version has the ability to assign roles and permissions for each user.