Yes you can do that - I run dnn 1, 2 & 3 sites on a single server..
Can I suggest, if you have no custom modules you have written for 3.013, that you at least upgrade to 3.1.1 - it has over 100 bug fixes and may perform better.
I recently upgraded a dnn 3.013 site to dnn 3.2.2 without any problems - it was a standard install, and I backed up, upgraded to 3.1.1, backed up and upgraded to 3.2.2 and the site went well.
But the answer is Yes you may deploy multiple instances of dnn on one server.
Nina Meiers