How can I save filter with email and re-use for other event tracking?

 Than you so much for the community for help.

<What I am trying to do>

On Segmentation time trend feature, I am trying to track # of use except for our customer success. 
 

<Challenge>
Though it is possible to filter by email (remove email based on our company domain), we need to update filter every time when when new customer success.>

<Potential solution>
I thought it might be possible to create “custom filter A” that consist of set of emails, and once I update that “custom filter A”, that applies to all the output that uses the “custom filter A”.  However, more elegant solution is also appreciated.