Layout Modules and Logical Systems

In transaction WLSE I can send out a LAYMOD01 iDoc to a specific logical system. This works very well. Now I want to send out these iDocs on behalf of LAYMOD change pointers.

Normally a datafilter can be used in the distribution model, but no datafilter has been developed:

Object type: BUS1083

Objec Name: SiteLayoutModule

Program: RBUS1083

A solution for distribution may be defining a field with the identification of the logical system and develop a filter for this.

Please bring up your suggestions to determine the logical system(s) connected to the layout module.