1 Corinthians 9:21

To them that are without law, as without law, (being not without law to God, but under the law to Christ,) that I might gain them that are without law (KJV)

Then: Paul became lawless to those who were not under the Jewish law - the Gentiles (because everyone is under the laws of a state or nation). Again his purpose was to gain them for Christ.

Now: Even though Paul went to the Gentiles, he would never and could never have dishonored Christ by breaking a law which was crucial to maintaining his credibility as a follower of Lord (ten commandments). He would not go into the gang cultures, steal and do drugs. Our service as a slave to Christ has to be intentional and practical as it exemplifies his love.