So we have realtime events and they are great but the issue we are having is very often we don't need the full "hosepipe" of events only events related to a specific record or user where based on some method they are marked as high risk. Is there any way to filter these events before they are sent to us as 99% of all of these events we have no interest in and are just dropping it seems wasteful.
['https://salesforce.stackexchange.com/questions/384030', 'https://salesforce.stackexchange.com', 'https://salesforce.stackexchange.com/users/94095/']
With winter 23 one can easily filter platform event by defining a filter expression via the metadata or the tooling API!

Check out the details [here](https://developer.salesforce.com/docs/atlas.en-us.platform_events.meta/platform_events/platform_events_filters.htm)

Read more about the General Availability of the [feature](https://help.salesforce.com/s/articleView?id=release-notes.rn_platform_events_filtering_ga.htm&type=5&release=240).
You can use [PushTopic](https://developer.salesforce.com/docs/atlas.en-us.api_streaming.meta/api_streaming/pushtopic_events_intro.htm) to listen for specific updates, assuming you can define those updates in a SOQL statement. Each client can create a PushTopic to listen for specific events, then cancel them when they see no longer necessary.