This? Finding outbound/inbound requests to an app?
Not sure it's worth an entire post. But:
The application in question is NetLimiter for Windows https://www.netlimiter.com/
(I'm sure there are others, btw)
It acts as a per-application firewall. It also has the ability to block internet access completely, as well as Priorities (bandwith allocation) per application.
By default it will pop up a window every time an application makes web requests, either inbound or outbound.
You have the option to Deny or Allow the operation. And options to have that be temporary (next x minutes) or permanent.
After being set up an alarming number of applications will cause NetLimiter popups, but very soon everything will either be allowed or blocked.