[asirvent]

Creo q es esto lo q andas buscando:

//////////////////////////////////////////////////////////////////////

unit principal;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;


const
LOGON_WITH_PROFILE = 1;
LOGON_NETCREDENTIALS_ONLY = 2;

function CreateProcessWithLogon(
lpUsername: PWChar;
lpDomain: PWChar;
lpPassword: PWChar;
dwLogonFlags: DWORD;
lpApplicationName: PWChar;
lpCommandLine: PWChar;
dwCreationFlags: DWORD;
lpEnvironment: Pointer;
lpCurrentDirectory: PWChar;
const lpStartupInfo: TStartupInfo;
var lpProcessInfo: TProcessInformation
): BOOL; stdcall;


type
TForm1 = class(TForm)
Label3: TLabel;
Label5: TLabel;
b_ejecutar: TRxSpeedButton;
b_acercade: TRxSpeedButton;
b_cerrar: TRxSpeedButton;
Label6: TLabel;
open: TOpenDialog;
aplicacion: TEdit;
RxSpeedButton1: TRxSpeedButton;
procedure Button1Click(Sender: TObject);
private
public
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

uses funciones,acercade;

function CreateProcessWithLogon; external advapi32 name 'CreateProcessWithLogonW';

procedure TForm1.Button1Click(Sender: TObject);
var
wUsername, wDomain, wPassword, wApplicationName: WideString;
pwUsername, pwDomain, pwPassword, pwApplicationName: PWideChar;
StartupInfo: TStartupInfo;
ProcessInfo: TProcessInformation;
begin
wUsername := 'USUARIO';
wDomain := 'DOMINIO';
wPassword := 'CLAVE';
wApplicationName := aplicacion.text;
pwUsername := Addr(wUsername[1]);
pwDomain := Addr(wDomain[1]);
pwPassword := Addr(wPassword[1]);
pwApplicationName := Addr(wApplicationName[1]);

FillChar(StartupInfo, SizeOf(TStartupInfo), 0);
StartupInfo.cb := SizeOf(TStartupInfo);
if not CreateProcessWithLogon(pwUsername,pwDomain,pwPassword,LOGON_WITH_PROFILE,
pwApplicationName,nil,CREATE_DEFAULT_ERROR_MODE,
nil,nil,StartupInfo,ProcessInfo) then
RaiseLastOSError;
end;

//////////////////////////////////////////////////////////////////////

Con esto podras ejecutar aplicaciones utilizando permisos de otros usuarios.

un saludo