The regulations regarding bank accounts have become stricter so that people can't funnel dirty money through their bank account.
この場合、次のような言い方が自然で良いかなと思います。
ーThe regulations regarding bank accounts have become stricter so that people can't funnel dirty money through their bank account.
「裏金を送金できないよう、銀行口座に関する規制はより厳しくなっている」
to funnel で「注ぎ込む・送り込む」
dirty money で「裏金」
ご参考まで！
カナダ 
