Fir Chalaayega kya labour officer ka IPC se BNS tak ka case?

Bhai, main to completely confused ho gaya hoon. Mere professor ne bola ki IPC se case labour officer ke paas chalta hai par usne kaha bhi nahi ki kya case IPC se labour office ki court tak jata hai ya fir directly BSN court mein. Ek case hai, example hai, labour union ki members ke sath kaam karne se kuch employee kaam chhodkar ghus gaye the, phir woh union ke against case file kiye, woh to labour court mein case chalaane ke liye ja raha tha. Fir koi IPS officer ne FIR register kar di, ab voh IPS officer ka case ke saath IPC mein jaane ki kya zaroorat hai? IPC court aur labour court me kya farq hai?