It will be treated as sexual harassment if a woman is discriminated just because of being female. Like, if a female employee is given more work or given less work as compared to male counterpart then it is sexual discrimination and that can considered as sexual harassment.
Although in India, as a general practice in office, female employees are given more liberty just because of Indian culture. They are given less work and work that has low challenge jobs. Generally outdoor work is not given. But this too is asexual harassment as per present Indian Laws.
But, if you are interested in more work and want equal challenges compared to male employees then you should ask your superior to give work to you accordingly. Because, he may be treating in better way being a female as per his thinking. But you should be careful as if you start doing more challenging work then it will not possible for you withdraw from it and you will get less time for you other activities. You may get less leave and less time for family and relatives.