At the request of @Robban I am opening this feature request. As it stands, you must either track every client on the network or none at all. This is the same for rx/tx stats.
I am proposing a drop down similar to the way network client access switches work. You would be able to select which clients are tracked and which are ignored.
I forget the exact details as I was forced to remove it immediately but when I installed this awesome addon, my HA was flooded with hundreds of devices/entities I was not interested in having in HA. I mostly wanted to integrate a small select number of wifi devices, and my UDMP, 13 switches and 4 APs that are running my home network. The more features to limit what is exposed the better. Even more so if one can selectively add stuff later.