Split sprint velocity by project

[Valerie Liarikos]

I am wondering if anyone has a way to split the sprint velocity by Project. Our sprints have multiple projects in them and I want to know the velocity on a per project level. 

Thanks! 

[Peter Geshev]

Can you elaborate more on your agile usage? Do you have different teams, each working on a specific project(e.g. team 1 works on project A, team 2 - project B, etc) or do you have teams working on multiple projects at the same time(team 1 works on projects A, B, C, team 2  works on project B, team 3 works on projects A and C)? Do all teams work on the same backlog(i.e. have the same reference story point estimation)?

[Valerie Liarikos]

We have teams working on multiple projects at the same time. For example if team A is working on projects A, B, and C during a sprint, I would like to know what the velocity of project A,B,and C was during the sprint. Team B uses a different backlog with projects D, E, F. 

I know this goes against standard principals but I need to subtract the work of one project for some sprint velocities.