At this time, Indigo 1.1.9 doesn’t have the settings yet that allow you to setup anisotropy in an easy way, according to some of threads in Indigo forum. Meanwhile, there are also some posts there where someone suggested a good way to fake the effect by using a bump map, and I decided to take a test of it. The following image is what I got.
More details, my homepage, please. You can also see how the three parameters, IOR, Exponent, and B in Bump map in Blendigo 1.1.7, affect anisotropy.