On an events based view of causality; yes. On a proper understanding of causality, i.e., the actions based view of causality, no. By events based I mean the classic billiard ball conception of causality. One event precedes and causes another event. On the actions based view of causality, a thing's nature or identity determines the type of actions it can take. On the actions based view, actions are determined, not by antecedent events but by the nature of the thing that acts. So, on this view, man's will is free because he is acting in accordance with his nature, i.e., a being with a volitional form of consciousness. His will is free because that's the type of will he has, a volitional one. Free will, on this view, is the ability of man to think or not, to recognize facts or evade, to focus his mind or volitionally defocus it to evade some fact that is not pleasant or desirable.
For instance, you may be reading this in a state of meandering attention, not really grasping what I've said or you can focus your mind fully and really read and analyze what I'm saying. You can say that you don't like what I'm saying and ignore it in the hopes that it will not be true. Or, you can analyze it, look at it from every angle, consider the entire range of available facts and come to some conclusion. That is your free will, essentially. Your conceptual faculty is the part of your consciousness that you have control over. Other parts of your consciousness are not free. Perceptions are not free, emotions are not free. They are automatic. If man did not possess a volitional form of consciousness his will would not be free. If like the other animals, he had reached only the perceptual level of consciousness his will would not be free.