How do you learn new domain,if you are not aware of it?
Ex:you were working in Banking Domain,in ur nxt project if you are working in Health care domain?
Re: New domain
You may wish to do some research in that domain. One specific suggestion is to find people that work in that industry and ask them about their jobs, what kinds of software they use, what they like and don't like about using that software.
Another suggestion would be to perhaps find an online forum for that domain just like you did for software quality assurance, how about finding one for banking?
Research would be a good idea. Have you thought about taking your own skills and applying to a new environment/domain? What you know in one industry may be applicable to another, but you need to figure out how to recognize those things.