If the user writes something on the web, i.e. in a web browser, then this browser alone is going to get the response for that request.
A TCP connection and the HTTP connection on top are a two sided channel, only the two parties involved (browser and web server) have access to the data (especially if the connection is encrypted).

In case your program is the client, e.g. using QNetworkAccessManager, then it will receive the response to the request it made.

Cheers,
_