Creating KM folders and assigning to users

Hi All,

We have a requirement where the user after doing transaction in ECC thru portal generates PDF document like PO, Return PO, Good receipt etc.

These PDFs need to be stored in Portal for later use by the user. How can we use KM to achieve this? If we create folders in KM and assign to users, is there a way we can assign where in each user will be able to see only documents saved by him.

Any other solution is appreciated.

Thanks

Uday