How to add a new KNA1 field to filter the object CRM CUSTOMER_MAIN in R3AC1

Hi Experts,

The standar funcionality of the Tx. R3AC1 only allows filtering of 4 fields in the customer download from ECC to CRM. Object CUSTOMER_MAIN.

In our current project, The partner asks us to filter by another field of the KNA1, is this possible??

Is there any way to use more fields as filters??

Thanks in advance,

Regards,

José Manuel Romero