Process.Start(new ProcessStartInfo
            {
                FileName = "regedit.exe",  //zb regedit
               //Arguments = "...",
            }).WaitForExit();

            Process.Start(new ProcessStartInfo
            {
                FileName = "regedit.exe",  //zb regedit
               //Arguments = "...",
               User = "Username",
               Domain = "Computername"
            }).WaitForExit();

         WindowsIdentity impersonatedIdentity = new WindowsIdentity(hToken);
            WindowsImpersonationContext myImpersonation = impersonatedIdentity.Impersonate();
            //Prozess starten
            myImpersonation.Undo();

[DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
internal static extern bool LogonUser(String lpszUsername, String lpszDomain, String lpszPassword, int dwLogonType, int dwLogonProvider, out IntPtr phToken);

[DllImport("advapi32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
internal static extern bool LogonUser(String lpszUsername, String lpszDomain, String lpszPassword, int dwLogonType, int dwLogonProvider, out IntPtr phToken);

UseShellExecute = false,
Domain = "computername",
UserName = "username",
PasswordInClearText = "password" //oder Password

class Dienst : ServiceBase
{
override OnStart(string[] args)
{
ArgumentParser parser = ArgumentParser .Parse(args);
StartProzessAlsBenutzer(parser.accountName, parser.password, parser.Path, parser.args);
}

void StartProzessAlsBenutzer(string userName, string passwd, string appPath, string[] args)
{
//Wie oben beschrieben
}
}

        private static void StartProcess(string path, string args)
        {
            Process.Start(new ProcessStartInfo
            {
                FileName = path,
                Arguments = args,
                UseShellExecute = false,
                Domain = "COMPUTER",
                UserName = "Admin",
                PasswordInClearText = ""
            }).WaitForExit();
        }

        private static void StartProcess(string domain, string userName, string passwd, string path, string args)
        {
            System.IO.File.WriteAllText("C:\\Output.txt", path + "|" + args);

            Process.Start(new ProcessStartInfo
            {
                FileName = path,
                Arguments = args,
                UseShellExecute = false,
                Domain = domain,
                UserName = userName,
                PasswordInClearText = passwd
            }).WaitForExit();
        }

protected override void OnStart(string[] args)
        {
            try
            {
                StartProcess(args[0], args[1], args[2], args[3], args[4]);
            }
            catch (Exception ex)
            {
                pipe.WriteStr(ex.Message);
            }
.....
....