Redmine

Hi to all
I want to use RedmineReceivingEmails to import email in my redmine, but I want a project for every customer, because I want customers can see all their collegues issues, and maybe using wiki and forum so I need every customer has his own
so now I've only one solution: create a mail for every customer (eg: customer1@mydomain.com, customer2@mydomain.com, etc.) and create many cronjob to associate every mail to right project. it's not very useful.

so I've downloaded Custom Workflows plugin and it's seems very interesting, but I've to understand how create a rule (if possible) to move issues created by email from a generic project (issues@mydomain.com) to the right project checking user's group or mail's domain (eg: move user@customer1.come to customer1 prject)

does anyone use it or have other ideas about how do this? thanks