User Permissions

You can edit and add new users on the admin panel at /admin/auth/user/. You will need to give new users permissions based on the access you wish them to have. If you wish someone be able to see all clients and projects to be able to add them to an entry, but not edit or delete them, you need to give them view permissions under User permissions. These would be core | project | Can view project and core | client | Can view client.