A curfew is read as restriction on your freedom, often from rules you did not choose. Dream books link it to feeling held in, or to a deadline pressing on you.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.