DSO --> DSO Data load in Group

Hi,

Need your advise on how to meet the below requirment

MY Data Flow DSO1 --> DSO2.

DSO1:

One of the key fields of DSO1  is Load Date (System Date)

DSO 2:

In Start routine of DSO2 we are using function module Period Covert based on Load Date which is used in Select statements.

I am in processing of doing some bug fix and required to do a data load from DSO1 --> DSO2.

Is there any way i can restrict the package to load data specific for one load date.....

Ex:DSO1 consists of records related to 300 unique Load Date....... 

IS there any way that each package loads all the records specific to one load date

Thaks in advance