I have a .com site and I recently bought same domain at .net.org and .us. Could you please tell me how can I direct traffic from .net.org and .us. towards .com domain without being penalised by google? I want to have only one site with 4 urls. Will this be ok? please help me I have this domains since March and I didn't use them.
Sorry, that is outside of our realm of knowledge. You'll need to do your own research.
If your hosting allows it, you can try adding the new domains as "Parked Domains" and that should redirect them, though I'm not sure how Google "sees" that.