Can you install 2 different versions of iTunes on one mac using different users

..has anyone tried doing this ? I have itunes 10.7 but I'd like to create a new user and install the most current iTunes version on the new user account

If all you want to do is check out the new version of iTunes, why not create a backup of your current system? Update to the new iTunes and if you don't like it, restore the older version from your backup.

It's complicated , but I want to have both.

Why is it complicated ?
You are already defining a ( potential ) solution without indicating what the problem is.

Cheers ... McBie

McBie , I use 10.7 for my personal iTunes library. But I work with music files for my work , and it could be good to create a new user profile anyway for my work. There are some functions on the newest iTunes that I use for work. That is why I want to have both

The short answer to your question is no. You can certainly create separate iTunes libraries, or separate user accounts, as you see fit -- but they'll both be running the same copy of iTunes.

My suggestion is to update to the latest iTunes, and set up either separate work/personal user accounts or more simply set up two separate iTunes libraries and switch between them as desired.