Premium Pre-Sales Question: Custom fields

Heya, my organization is contemplating the premium version of this plugin, but we need to see if it meets our use case.

Is it possible to create a notification, that allows an ACF dropdown field to select who the notifications go to?

We want to send specific notifications to users assigned to a post ID–we currently have an ACF dropdown that contains all the posts of a custom post type and that is assigned to the user at registration. Sometimes we want to publish a post that sends notifications to only a specific post ID.

So, yeah, we’re asking if this is possible using hooks/filters, etc. If so, could you point me to the documentation that could be used to do this.

Thanks!