Filtering tickets

[Wasim Buden]

Hi,

I have built a customer support portal and this portal I used by both internal employees and our customers to open tickets. How can I keep a track of all the tickets which customers have opened?

Say, for example, every time a ticket is created if the domain is not abc.com, I want those tickets to get an automatic tag added something like 'Customer tickets'

Option B: I want to filter tickets excluding one domain abc.com 

Please help.