Redmine

Currently I'm using Redmine to manage several totally unrelated projects that I've created.

Those projects have different teams and for some teams I have setup a Google Apps based on the web domain name of the project.
For projects that have Google Apps account, I would like to use specific email addresses for the users instead of the default email.

For example my friend Tsuka have a personal email account tsuka@personal.com that he registered in my Redmine to participate to my projects. We agreed to setup a Google App for a specific projet to allow providing email addresses fully consecrated to this project. I then added an email account on this project for Tsuka like tsuka@specialproject.com .
The problem is that Tsuka will also work on another project (in the same Redmine) and will use his personal adress. I cant setup the Redmine account to send emails from one specific project to a different email for this special project - not sure I'm totally clear here.

So the idea is to provide a way to specify another email address for a user in the context of a specific project. The "default" value would be the normal email adress but we could then add another email address for notifications of a specific project.