The Imam's intention to lead people in Salah is sufficient for those performing Salah behind him. There is no need to have a special intention for women as there is no evidence for doing so. Women used to perform Salah behind the Messenger of Allah (peace be upon him) and it was not reported that he had a special intention for leading them. (Part No. 6; Page No. 323) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.