Does anyone knows the settings for using TOR ?
I don't believe that functionality is available in the projects current state, so there would be no setting for that. Not saying some iteration of TOR like functionality won't be available, just not a priority compared to other desired deliverables. The beauty of Qortal is it is built to support such features and any 3rd party can leverage Qortal to make it happen, if not today in the very near future.
I know we had a Qortal node on the Tor network at one point... I will have to ask dmax about it and get the method of configuration, as I believe he might be the only one to have done it so far.
I will post here once I know the answer.