Lock access to ABAP system - Allow access to JAVA system

Dear SAP colleagues,

We do have 2 SAP SRM systems :

1. DL1 is our SRM-ABAP system

2. DJ1 is our SRM-JAVA system

A user is created in DL1 (ABAP) system.

The DJ1 UME links to DL1. In other terms, a user is created in ABAP system (DL1) and automatically replicated to JAVA system (DJ1).

My question :

We want to give access to our user only to DJ1 (SRM-JAVA) system.

User must not be able to connect on SRM-ABAP system (DL1).

If I lock the user in DL1 (ABAP), it is automatically locked on JAVA system (DJ1), which is normal.

User has ABAP roles and JAVA roles.

Is there a solution to give access to a user on JAVA system (DJ1) and lock the same user in DL1 ?

Thanks in advance for your suggestion, even if it is a strange request ...

CP