An INFJ is someone who is an "Introvert, iNtuitive, Feeling, Judging" person, according to the Myers-Briggs Type Indicator (MBTI). Libras are people born between September 23 and October 22, and they are typically symbolized by the scales.
There is no direct correlation between the MBTI and zodiac signs, so whether a Libra can be an INFJ or not depends on the individual's personality traits. However, it is possible for Libras to have INFJ traits, and there are many examples of famous INFJ Libras, such as Mahatma Gandhi and Carl Jung.