Data Mapping - Routing Table Classifications - Values

Good morning everyone.

We currently use the Routing Table:Classification found under Manage Data Mapping, to assign tickets to queues.  Using the Key1 value, here is what we are attempting to do:

We will be creating categories starting with a site location:  For example Campus 1, Campus 2, Campus 3, etc

Under each campus there will also be a Network Support Category.  

For Campus 1->Network Support we want it to fall into a que for that campus

For Campus 2->Network Support we want it to fall into a separate que for that campus.

To add to this is there a way to make an exception:

Campus 2->Network Support->Wireless fall into the que for Campus 1?

I know this is a strange setup, but unfortunately, this is how our organization is set up.

I read somewhere to separate the values with a "." but not sure if this works with the data mapping or within the ruleset for OnIncidentReceived.

Any help or guidance would be appreciated.

Thanks