Either you own the home (or a share of it) or you don't. A lien (normally) is not ownership, but it gives you the right to step in and assert ownership if certain conditions occur. (For example, a mortgage includes a lien that allows the bank the right to step in and assert ownership if you stop making payments. The bank does not own your home unless they assert ownership by foreclosing.)
If your ex was awarded the entire house then I don't know why you were given a lien -- presumably to enforce some kind of monetary right you have, such as to be paid a certain amount of alimony, or to be paid a certain amount when the home is sold. Can you add more details?
