Magento – Magento2 SOAP API for multi-store

Finally I found the solution, you are right Marius. See detail.

    Dim pws As New MagentoService.MagentoService
    Dim sesionID = pws.login("xxxxxxx", "xxxxxxxxxxx")
    Dim result

    Dim filters As New MagentoService.filters
    Dim complexFilter(2) As MagentoService.complexFilter
    complexFilter(0) = New MagentoService.complexFilter
    complexFilter(0).key = "manufacturer"
    Dim assEnt As New MagentoService.associativeEntity
    With assEnt
        .key = "manufacturer"
        .value = "34"
    End With
    complexFilter(0).value = assEnt

    complexFilter(1) = New MagentoService.complexFilter
    complexFilter(1).key = "set"
    Dim assEnt2 As New MagentoService.associativeEntity
    With assEnt2
        .key = "set"
        .value = "9"
    End With
    complexFilter(1).value = assEnt2

    filters.complex_filter = complexFilter
    result = pws.catalogProductList(sesionID, filters, "0")

Now I get SOAP answer filtered by set and manufacturer.

Thanks

finally I found a solution

$client = new SoapClient('http://example.com/index.php/api/soap/?wsdl');    
$session = $client->login('xxxx', 'xxxxx');

 // $productInfo is array which contains all product sku and its quantities which will update to another server 

 $productInfo = array( 
                array('sku'=>'sku1','qty'=>'50000'),
                array('sku'=>'sku2','qty'=>'110'),
                );

$start = microtime(true);
foreach($productInfo as $product )
{
    $calls[] = array('product_stock.update', array($product['sku'], array('qty'=>$product['qty'])));
}

  /* 2 products will go in one request to another server for product   update   stock data(in my case quantities) using SOAP API multiCall method 
 IF YOU HAVE LOTS OF PRODUCT FOR UPDATE TO ANOTHER SERVER THEN YOU CAN REPLACE VALUE IN array_chunk function(in my case 2) 2 is total products data
   */

 foreach(array_chunk($calls, 2) as $skuChunk)
  {
     $result = $client->multiCall($session, $skuChunk);
  }
  echo $time_elapsed_secs = microtime(true) - $start; // How many times will be elapsed for this operation