I don’t understand the question. Monetary issues must be decided in beis din, not secular court. Permission to utilize secular courts must be granted by beis din in all situations, not just monetary issues that arise during divorce proceedings.
Someone one who utlizes secular courts without permission of beis din is called someone in halacha. Just don’t remember to term. Halacha does view monetary “gains” via secular courts as gezel IF no permission to utilize the courts was granted by a beis din.