if you are using QlikView own UserID and Password (as opposed to NTNAME), then no - unfortunately there is no native capability for the users to manage their passwords. You'd need to develop that logic outside of QlikView.
For this reasons, most companies opt for integrating security with Windows networks and Active Directory, in order to leave the job of authentication and password management to Windows.
An enterprise level a solution could be to use third party authentication layer in front of your QlikView Access Point such as single sign on by Site minder or other.
Users can manage their profile password out side of QlikView. Whenever they login to Access Point their call will be redirected to Site minder for validation and then directed to QlikView Access Point.