Restrict Attachment List in Services of Objects

Dear All,

We are using Archive Link Framework in which we are attaching documents for any display transaction using Services for Objects -> Store business Documents from different SAP User Ids.

When we view the Docs using Services for Objects -> Attachment List, all the docs are viewable belonging to different SAP User Ids.

I had a requirement to restrict the view baser on User which has login...

I.e. If I have login through User Id XYZ, so the docs attached though User ID XYZ will be seen and not the other ones.

Can anyone tell me where should I put the Enhancement for this?