Selecting Which Keyword To Use

I found that if you click the drop down of the keyword token, you can use the First, Last, or All of the keywords in the rule. Is it possible to select a keyword other than the First or Last? like 2nd or 5th, etc.

Not at the moment. There is an entry in the feature database for this but I believe you are the first to actually ask for it. Can you go into more detail in how you would use this?