Aqui tenho duas formas realmente interessantes apara a criação de usuários locais. Vale a pena dar uma boa olhada.
#################################################
# Criação de usuário local para gerencia1 #
#################################################
$Conta = "adminlocal.cliente"
$Descript = "Administrador da conta cliente"
$Pass = Read-Host "Entre com a senha do usuário" -AsSecureString
$Grupo = "Administrators"
New-LocalUser -Name $Conta -Password $Pass -FullName $FullName -AccountNeverExpires -Confirm -Description $Descript -PasswordNeverExpires -UserMayNotChangePassword
Add-LocalGroupMember -Group $Grupo -Member $Conta
net user $Conta
#################################################
# Criação de usuário local para gerencia2 #
#################################################
net user "admin.cliente" /delete
net user "admin.cliente" "123Mudar$" /add /comment:"admin.cliente"
wmic useraccount where "admin.cliente" set passwordexpires=false
net localgroup Administrators admin.cliente /add
net localgroup Users admin.cliente /delete
net localgroup Administradores admin.clienten /add
net localgroup Usuarios admin.cliente /delete