Explanation
A user can have more than one Writable Volume attached at the same time if the volume is OS-specific, or created for a computer with a specific prefix. For example, suppose that you create a Writable Volume for each of the following:
A Windows 7 machine
A Windows 10 machine
A computer with Win2012-dev prefix to its name
A computer with Win2012-test prefix to its name
Then, when the user logs in to these different machines at the same time, each Writable Volume that is assigned to the specific machine is attached to the user at the same time.
https://docs.vmware.com/en/VMware-App-Volumes/2206/app-volumes-admin-guide/GUID-B527414C-C0DC-4