Do you need more protein intake when weight training?

For optimal results! Weight training is one of the best sporting actvities. To optimize resluts, you should eat 2grams of protein for every kilogram of body weight (2.2 lbs), or approximately one gram per pound of weight. More than this will not help.
Yes but. You do need more protein, but there are many types of protein and varieties of dosages, etc. I would consult a personal trainer to advise you on what your goals are. Protein is always needed, but it must be digestible and taken at the right time.