Easiest way would be to create a new custom property applied to interfaces, and then add a value to this custom property just to the interfaces you're interested in seeing. Then, add the resource "Curent Traffic on All Interfaces" to your view, and then edit this resource.
In the Filter Nodes (SQL) section, add in:
NewCustomProperty = 'WhateverYouSetItTo'
Change the Title and Subtitle fields accordingly and submit the changes. You shoudl then only see these new interfaces and the traffic on them
This did exactly what I needed, thanks for your help!