そうです！冗談は言葉の遊びです。「会衆」という言葉は、教会の礼拝に出席する人々のグループと、集まって整頓されている人々のグループの両方を指すことができます。パンチラインは、司祭が彼の傘を使って「彼の会衆を並べる」ことを意味し、彼らを雨から守り、彼らの間で秩序を維持することを意味します。
Certainly! The joke is a play on words. The word "congregation" can refer both to a group of people who attend church services and to a group of people who are gathered and kept in order. The punchline is that the priest uses his umbrella to "keep his congregation in line," meaning both to protect them from the rain and to maintain order among them.