In a Poll - can I view what each username voted ?
In addition, log the IP of vote so no one will vote few times from same computer ?

If not, any extreanl voting services I can use and securley embed in the forum so only registered users can use ?

With forumotions poll you cannot view who voted, or for what., and by default only 1 vote is allowed per voting poll, there is no option for allowing more votes.

But you can use another service and add it as a "widget" here. This one affords you the ability to allow more than one vote or limit it to just one per user, and logs the IP, There probably is a way to restrict it to your registered members only in there "Knowledge Base" section.

http://www.micropoll.com/

Thanks, how can it be integrate with forum so the user ID pass to the poll ?

You'll have to read the "Knowledge Base" section on the website.