Not foolproof if the file must be shared (otherwise you could of course just use a password)
The best you can do would be to use code to check that the workbook was being saved to your computer (using a unique network computername, or a more detailed WMI checking for specific info). Which in turn means you need to try to enforce using macros - this is typically done by hiding all the sheets with passwords then using code on start-up to unhide them. If macros are not enabled the sheets are left unhidden and the user is directed to a splash screen saying "please enable macros"
But these techniques are easily bypassed by someone with basic VBA knowledge, and tools that unlock VBA and sheet protection are also widely available
Regards
Dave