Separate callbacks for each run in multistart optimization?

[TorkelE]

I would like to use a callback to record the progress of the optimizer. However, once I want to do multistart optimization (https://docs.sciml.ai/Optimization/stable/tutorials/ensemble/) this gets messy. here, each runs simply add things to the same record vector.

Is there a way to pass alternative callbacks to each run in the multistart? Alternatively, can I record the trace in the solution object somehow?