Normally Kittens are involved in a owner/pet style of relationship dynamic (assuming the kitten isn't stray), although this isn't always the case.
Over the last few years I've slowly learnt that there are many types of Doms, and that every now and then you're likely to find a Kitten who is also a Dominant.
I find the idea of Kitten-Doms rather interesting as it opens up a whole new power structure between participating members. Given that kittens are mostly peaceful, loving animals, when they become a Dominant, from what I've come to understand, it is mostly based on the owners desire to make the kitten happy.
For example, in a standard Owner/pet relationship, a kitten may ask for a glass of milk and whether they get it or not is dependent on the owners decision, but if it is a Pet/owner dynamic then the kitten will request the milk and the owner will comply.
It is a mentality shift from 'this is my pet' to the reverse idea of 'this is my owner'. I personally have been in relationships like this and find it wholly enjoyable, if not preferable. I've always found myself naturally taking on a role of caregiver to my partners and looking after them, while still maintaining a strong kitten head-space.
Being a kitten is a safe and exciting way to explore who you are and find things that you enjoy, and if you incorporate being a Kitten into your relationship it's about making sure you find an arrangement that fills both your needs and that everybody is comfortable with.
So in short, yes, a kitten can be a dominant, it just depends on the kitten them-self and what they personally want and enjoy.