How to create a custom read online role to allow users to self serve reports that are segregated

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Hi All

 

I am struggling to get to grips with one area of reporting and that is allowing users to self serve some key reports we have but I need them to be segregated to themselves/their own cost centre.

 

The reports I am looking to do is a procurement requester report I have build, and I want users to be able to see all POs that they have raised and are requester for. What custom role/seeded role is their so they can have a view of this report (I also want to pin this report onto there oracle homepage - is this possible?)