Segmentation based on BP Relationships

Hi All

Is it possible to segment customers to find their relationships in classic segmentation?

Example: BP ABC.Inc has legal advisor (partner function) LEGAL.Inc.

Step 1 - In segmentation we derive 1000 BPs based on their attribute values (like find all BPs that are Gold Customers)

Step 2 - Derive Legal advisors based on PF maintained under relationships (BP ABC.Inc has legal advisor (partner function) LEGAL.Inc)

We copied FM "CRM_MKTTG_PF_FIND_CPS" and creates a custom FM and then used it with info set "CRM_MKTTG_BP_PRTFUNC" on a data source, but we are running into issues. It doesn't seem to work.

Please confirm if this feature could be used on classic segmentation.

Thanks.