Different task sequence for different users on servers

So I have created 2 users on my mdt server and I want each one to deploy a certain task sequence when depending on which one I logged on to .

the problem is that I am amknig it zero touch so in the Bootstrap.ini file I can only choose one UserID . This is a problem because in my custom settings.ini file I am using the USERNAME environment variable but it is always going to be the one that was used in the bootstrap file (correct me if thats not true)

so what do yall suggest i do?

here are my settings

[Settings]

Priority=UserName,Default

Properties=MyCustomProperty

[User1]

SkipTaskSequenceID=YES
TaskSequenceID=001

[Default]

OSInstall=Y

SkipCapture=YES

SkipAdminPassword=YES

SkipProductKey=YES

SkipComputerBackup=YES

SkipBitLocker=YES

DeployRoot=\\TestServer\DeploymentShare$

SkipBDDWelcome=YES

SkipComputerName=YES

OSDComputerName=AvaPlus

SkipDomainMembership=YES

JoinWorkgroup=WORKGROUP

SkipTaskSequence=YES

SkipUserData=YES

SkipProductKey=YES

SkipLocaleSelection=YES

SkipTimeZone=YES

KeyboardLocale=0407:00000407

UserLocale=de-DE

TimeZoneName=W. Europe Standard Time

SkipSummary=YES