Transaction Matching : How to transfer support attribute data into adjustment attributes

We want to use a one sided adjustment to self-match transactions.
We need to define rules of adjutment type to create adjustments from supported transactions.
Adjustments can be sent to 50 different GL accounts.
The preparer will decide in which account the transaction will be created, and will write it in the support.
I didn't find how to transfer the data entered in the support (the account) to the adjustment

I can see only one way to achieve this, and I find it not effective :

• create 50 different support types, with 50 corresponding filters, and one adjustment type ADJ1
• then create 50 different rules :