Ip filtering with APM

Hi, I saw a very interesting updates about security: https://www.elastic.co/blog/improve-network-security-elastic-cloud-traffic-filters

I would like to apply a IP filtering. It's simple because I access to ELK from a Java Spring application that run on some server with a reserved IP.
However I do use also APM also in the client Angular application. I don't know how I could apply filtering on IP because I can't know in advance all IPs of people that open the Angular application.

Do you have some good hint to handle this situation? I would like APM and I do not want to loose it to monitor my client application.

Thanks