Named Set Dimension Date With Condition Others Date

I am using SSAS 2008R2, i am confused with create named set.

My Problem :

I have Dimension SalesDate and  Dimension OrderDatein FactSales, I want to produce data with condition sales date=orderdate.

Now, 1 Sales Date has any Order Date. How to handle this event, using named set? Because, will be used mu user analytical.

example for data :

No OrderDate    SalesDate   SalesValue

1    20130103     20130103    5000

2    20130103     20130104    6000

3    20130106     20130106    3000

4    20130106     20130109    6000

Every drag named set, expected result is

1   20130103     20130103    5000

3   20130106     20130106    3000

with condition order date = sales date.

Thanks

SUBHAN