[Locked, wrong forum] AEM Campaign Classic: Control Typology rule...

Hi Folks, Hope we have many Adobe Campaign experts in this group. I need a help if someone has done it already and provide the code snippet or send me to the right direction.

Ask: While sending email deliveries where are some seed addresses which are getting targeted along with the target audience. We want that email which goes to the seed addresses has the subject line prefixed with a text i.e. "Client Name Seed Email: " and to the regular audience it should go with regular subject.

Proposed Solution: I believe we can create a control typology rule/Typology to check if the recipient is a seed or not seed and based on that change the subject line.

If someone can help in implementing this solution it will be helpful.