Yes. Pink Backup will support each user on your computer given the 'Everyone' installation option. Each user will have their own backup projects. The Pink Backup Service will manage scheduled backups for all users.

You can if you have credentials for that user. In Backup Properties, the right most ellipse to the right of the target folder allows you to add another users' credentials.

No. Each file or folder will get it's own folder within the target.
For example:
    Given the backup location is F:\Backups
    and given 2 folders to backup called C:\Documents\Reports and C:\Development\MyApps
    This will result in a backup structure of F:\Backups\Reports and F:\Backups\MyApps
Using this method keeps the backups of a project together and the Restore operation knows how to put everyting back into place.

That depends. You can if you can map a drive to the desired location on another server. Alternatively, you can always backup to a folder that is synced by OneDrive or other cloud storage. URLs are not supported.

Pink Backup runs on Windows, 32bit or 64bit. It requires .NET Framework 4.6.1 or greater. If you don't have 4.6.1, the setup program should help you install it. Internal testing was done on Windows 10 Home addition and Windows 11 Pro.

For starters, any text based (not compiled) format, markup languages, source files, etc. In addition the following encoded formats are supported (may vary based on version): WordPerfect, Word, Excel, PDF and PowerPoint.