It is haram for a person who has reached the level of ijtihad to do taqlid for another mujtahid. This applies equally to men as well as women.
However, when the question of a marja` comes (i.e., a mujtahid who is followed by others), then one of the conditions is that the marja` must be a male. For example, the late Ayatullah al-Khu`i, says: "The conditions [necessary] in marja`i 't-taqlid...", before listing the well-known conditions ---like sanity, being baligh, iman, justice and being a male (Minhaju 's-Salihiyn, vol. 1, p. 7).
In short, a woman can reach the level of ijtihad and follow her own views but she cannot become a marja`.