@ Shri Padmanathan Ji,
W.r.t. your post at serial No. 11 above, as you are aware, my views - shared above - is with regards to facts quoted by the Querist read with my understanding thereto at explained in my post at serial No. 4:
Facts as per Query:
"Mr.A is gettingjob work from jewellery shop for making jewellery ornaments. Mr.A receives the Raw Gold (24 carat) and then he distributes the same to various job workers under him and make the finished product and Mr.A supplies jewellery to the shop. .............."
My understanding thereto as explained in post at serial no. 4 above:
"With the understanding that jewellery shop is a registered person who has given job-work (i.e. making jewellery from raw gold (24 Carat)) to Mr. A in both the described circumstances, ......".
With above background and considering Section 2 (68), I hold my view that Mr. A as 'job-worker' (and jewellery shop is 'principal / owner' of goods (i.e. raw gold)) in both scenarios as described in the query. And for first scenario, it is immaterial that Mr. A does not carry actual job-work by himself but get it done through his sub-contractors.
These are ex facie views of mine and the same should not be construed as professional advice / suggestion.