Can I use it on a shared computer in a conference room for Zoom, etc.?
Yes, you can.
[When one user uses a shared computer]
One QR code issued during the initial setup after installation is used by all users. Each user should read it with the Authenticator app on their smartphone (or tablet). In this case, the user ID, login password, and one-time password for that shared computer will be the same.
[When multiple users use a shared PC]
Once the installation is complete, each user logs in individually, opens the settings screen to display the Authenticator linking QR code, and reads the QR code with the Authenticator app to complete the process.
In this case, the login user ID, login password, and one-time password for that shared PC will all be different.
*If Active Directory is configured, the presence of an administrator is required.