gmail – How to use a label, but then filter out the extensions?

I’m setting up a new website/community and want to use my G-Mail account as the primary address. The problem is that I’m going to have a lot of emails coming through from different sources for different reasons, and I’d like to effectively sort my inbox, but how can this be done?

Here’s an example of what I will more than likely have:

To make things a bit clearer, I could then split it up for incoming messages:

I could then apply a filter/subfilter which could be Sevice/One.

Now this would be fine but I’d like to make it a little more dynamic by having further extensions:

So as you can imagine, I’d have to set up multiple sub-sub-labels in order to effectively filter out incominmg messages for each.

Is there an easier way, where I can use the Service/One label, but then filter out the extensions,

( contact/billing/twitter/etc )?