The Computer Logon MA solution utilizes NetBIOS names and domain DNS names to differentiate between personal and business accounts.  

In the Deepnet Configuration Editor (DCE), navigate to "MFA Platform | MFA Domains"

Add the DNS names of your domains that require MFA protection.

For Entra ID joined PCs, you do not need to add NetBIOS names. But for On-Prem AD joined PCs, you must also add the NetBIOS names of your domains.