How to use tokens in data selectors in Rules and how to get autocomplete to work?
Note: This is not an accurate answer of this problem, as by this time, the Rules module is still in development. This is what I did to solve my problem:

Download PHP Module, as it is removed from Drupal core and is a contrib module now. In Rules, create a new condition known as "PHP execute" and write a php segment which checks user role.

This is probably the easiest way around this problem and will work fine if you are trying to fiddle around. But for production site, I won't recommend this.