Can someone clarify the issue of , and sharia justice?

Many of you regular users to this section will know of a user by the name of 'Tom'. He regularly posts answers which focus on the idea that a woman who has suffered , must produce 4 male witnesses to the crime. This seems to me, a perversion of the truth. I do know that, for a man to claim a woman had committed adultery, he must produce 4 male witnesses of good character, otherwise the accuser will face punishment if he makes unjust accusations. However, what must a woman do, if she has been d. What is the legal process under sharia?