Google PPC Tracking

HI
One of my customer has an online shop and want to setup an adword tracking for my PPC campaign. The online shop has been built from Litecommerce.
In Google Adword, each campaign has multiple ad groups, and each group has multiple keywords. But Google only give us one tracking code for each campaign.
Is it possible to track each keyword’s conversion just using one tracking code? Or is it only tracking the total conversion for that campaign? How can google track different products conversion as my site sell many different prodcut.
Pleas share your knowledge if anyone know the answer about it.
Thanks a lot!

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