Adobe Form - SO Creation Offline scenario - Posting problem

Hi,

We have created offline adobe form for Sales order creation using ABAP Workbench SFP.

After entering the Sales order details, this form is emailed to SAP to create SO and SO is created in SAP.

Our requirement is when user1 send this form to SAP, SO has to be created by SAP user1.

and when user2 send this form, SO has to be created by SAP User2.

For this we have maintained Inbound distribution list in SO28. but problem is not solved.

Please help...