Who was the nominee playing the role of Katrina Ludlow in the Law & Order series?
nominee refers to result = 'Nominee'; the role of Katrina Ludlow refers to role = 'Katrina Ludlow'
SELECT T2.name FROM Award AS T1 INNER JOIN Person AS T2 ON T1.person_id = T2.person_id WHERE T1.result = 'Nominee' AND T1.role = 'Katrina Ludlow' AND T1.series = 'Law and Order'