There is really no such thing as vegetable lard. Lard refers to a fat coming from an animal. There is such thing as vegetable fats, like oil and shortening. Shortening is often called (incorrectly) vegetable lard because its look and consistency is similar to animal lard.
Recent studies suggest that lard is actually better for health than shortening. Shortening consists primarily of partially hydrogenated vegetable oil, which has proven to be very unhealthy for the human body.