Limit type of tasks in SAP BPM UWL substitution rules

Dear experts,

we have several BPM processes and are also using ESS in a central Universal Worklist. When the users create substitution rules for BPM they need to choose the option "All" in the "Assign these tasks" field to define substitutes for BPM tasks. Unfortunetaly these rules are active for all BPM and non-BPM processes.

Is it possible to enhance Universal Worklist so that different substitution rules for different processes (ESS, all BPM Processes or certain BPM processes) can be maintained separately? At the moment it's a all-or-nothing decision.

We are using version 7.30.

Best regards,
David