$UserMachineMapping = @{

"tmctesterson" = "LB-SPAREASUS1"


}

$CurrentUser = $env:USERNAME
$CurrentMachine = $env:COMPUTERNAME

if ($UserMachineMapping.ContainsKey($CurrentUser)){

    $ExpectedMachine = $UserMachineMapping[$CurrentUser]

    if ($CurrentMachine -ne $ExpectedMachine) {
        Write-Output "Access Denied Biatch! $CurrentUser is not allowed in $CurrentMachine"
        shutdown.exe /l
    }

}else {
    Write-Output "Access Denied! $CurrentUser does not exist in the List"
    shutdown.exe /l
}