How to specify which virtualenv to use in my django project?
This is how I do it .  

Create virtualenv.
Activate the virtualenv.
Install Django and other packages in virtualenv.
python manage.py runserver...  

Perhaps is not so much a case of Django using the virtualenv, as the virtualenv using Django.
I need help to understand how I can:
1) Choose which virtualenv my django project should use?
As I understood maybe I'm wrong! when I activate the virtualenv, that one my project will be using. 
But what about if I'm running on 2 different projects on a single server and each one should use it's own virtualenv?
I'm looking for your help :)