Server-to-Server App - How to limit access to specific users?

API and Webhooks
,
1

We have created an internal server-to-server app to subscribe to certain events via webhooks.

It currently works for all users within our account, but my question is - is it possible to limit the events to only a subset of users on our account?

App Type:

Server-to-Server OAuth
Intend to publish: No
Account Level
2

I noticed this option when configuring the app under the features tab:

Event notification receiver

  • All users in the account
  • Only users added this app

But struggled to find details on what this is doing, or how it is used.