No, when you use the Flash methods getURL or navigateToUrl, it sends a regular http packet that you cannot distinguish from normal browser requests.
SWF , ., SWF , , - , Apache .htaccess.
EDIT: , SWF .
var loader:URLLoader = new URLLoader();
var request:URLRequest = new URLRequest(whatever_url);
request.requestHeaders.push(new URLRequestHeader("pragma", "no-cache"));
request.requestHeaders.push(new URLRequestHeader("Expires", "Thu, 01 Jan 1970 00:00:00 GMT, -1"));
request.requestHeaders.push(new URLRequestHeader("Cache-Control", "no-cache, no-store, must-revalidate"));
loader.load(request);
, , SWF .