filter listings according to the listing type at the migration

[n00bster]

i have to "Migrate Favorites" to MyLists. 
the setup for "MyLists" is a per listing type definition, very list is linked to one "listing type". 

here is the problem, i have to filter the listings in the lists according to the listing type at the migration.
has anyone done this before?
or rather the question to Alejandro, would it be technically possible to tell which listing will be added to which list during the migration?

 

[Alejandro]

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