Porn addiction can affect men and women. While many men and women think about sex and porn differently, both have desires and a sexual appetite. Porn can affect people differently. For some it is an escape or a way to relieve stress. For others, porn can satisfy unfulfilled desires. A addiction to porn would imply that someone has become reliant on porn and that they cannot stop themselves. They need to look at porn.
There is nothing abnormal about a girl or woman looking at or watching porn. But, they can suffer from porn addiction just like a man.