Can one Distributor Assign from Multiple Queues / Users?

Each distributor can only assign from a single queue or user. This has a couple of advantages

1. Its quick. Grabbing records from a specific owner is fast in Salesforce. For large customers with millions of records this is important.

2. It stops DE grabbing records that already owned / being worked. Prevents one incorrect filter causing mayhem in you system.

We understand some customers would like to be able to grab records from anywhere without worrying about holding users / queues but for now that's not possible. You need to get records into a single owner ready for a distributor. Workflow rules / triggers / process builder can help with this task.