One of the best sources that I have found regarding the necessary amount of protein for vegan women is
http://www.vrg.org/nutrition/protein.htm
They provide you with a formula for protein recommendation based on your weight, it also gives you a great list of various sources/amounts of protein in foods. It does not, however take into account activity level, but Rice University has a link to one which gives you a weight based formula in conjunction with activity level
http://www.rice.edu/~jenky/caryn/protein.html
Sedentary adult 0.4
Active adult 0.4-0.6
Growing athlete 0.6-0.9
Adult building muscle mass 0.6-0.9
taken from Nancy Clark's Sports Nutrition Guidebook For a 150 pound male triathlete, 0.6 for a total of 90 grams of protein per day. For a 115 pound female high school track runner, 0.7 for a total of 80.5 grams of protein per day.
The RDA for female vegans is approximately 50-63 grams per day.
There used to be a lot of emphasis on protein combining in order to get a complete protein (plant proteins can be combined to include all of the essential amino acids and form a complete protein. Examples of combined, complete plant proteins are rice and beans, milk and wheat cereal, and corn and beans), however, most sources will now tell you that so long as you eat adequate calories and a balanced diet you can ignore the idea of protein complementarity. Just make sure you are eating a variety of protein sources and you shouldn't have to worry.
I hope this helps, I know it's long, but it's worth it not to have to eat a bucket of cottage cheese everyday:+ Let me know if you have any other questions