I believe you should be able to have one, if you can responsibly take care of it. Responsibility meaning haveing spent enough properly to minimize any chance for escape, hefty insurance, adequate housing, etc.
I personally know a few people who either have or have had large alligtors/caimans. One of them spent nearly 30grand retrofitting his basement to haveone safely and healthy.
There is a guy who's famous for having the largest snake in captivity, in his home no less. Spent a reportedly 70some grand on the security system, back up generators, electronic doors, etc.... those things aren't getting out!
Its nothing close to a big tiger or lion, but I've been tossing around the idea of picking up a snow bengal kitten.
-Tony Detroit, didn't Keely used to have a little tiger for awhile? Could have swore Damy said she did when she was younger.