Restriction in PPOSA_CRM

Hi,

I have a requirement. I have 2 position say marketing and sales. I have 2 users say u1 and u2.

Now the problem is that.

u1 : Need complete access to marketing and display only access to sales.

u2 : Need complete access to sales and display only access to marketing.

How this can be solved through org structure?

Thanks,

Nitin Sherry