Hello @siddharth3977
maybe you can use "Custom Dimensions" for this? https://piwik.org/docs/custom-dimensions/

or what do you mean exactly?

What I mean is, with each order which I pass in the piwik order api to track my orders, I also want to pass a seller id (who is the seller of the product ).
Like I track which my best sold products are , I also want to know which seller generated the most revenue by selling its product.

Hello,
For this please to set Custom Variables or Custom dimensions before sending your order. Then you can see sales and other metrics, for each custom value seller id. Hope it helps