Send event to specifics objects

[andrea993.93]

I'm developing a software with qt.
I have a thread that should sends events.
I want that some objects can open a specific flow with the thread.
The thread should register the objects that open the flow.
Through the flow, the objects will send requests to the thread and when the thread done a request it should notify it only to the object that had requested it.

I think that the solution is an event listener, but the thread should send the request only to the object that had opened the flow.
How can I implement this function?

Thank you
Regards,
Andrea