Android - How to left join on two columns using ORMLite?

I have the following table:

@DatabaseTable
public class Jobs {

    @DatabaseField(foreign = true, foreignAutoRefresh = true)
    private Client client;

    @DatabaseField(foreign = true, foreignAutoRefresh = true)
    private Client billingClient;

    ....
}

And I wish to run the following query:

SELECT `jobs`.* FROM `jobs`
LEFT JOIN `clients` ON (`jobs`.`billing_client` = `clients`.`id`  OR   `jobs`.`client` = `clients`.`id`) 
WHERE ...

When I try to build the above query using ORMLite's leftJoin method:

final Dao<Job, Long> repoJobs       = MyApplication.db.getJobsRepository();
final Dao<Client, Long> repoClients = MyApplication.db.getClientsRepository();

builderJobs.leftJoin(builderClients);

I get this generated query instead:

SELECT `jobs`.* FROM `jobs`
LEFT JOIN `clients` ON `jobs`.`billing_client` = `clients`.`id` 
WHERE ...

ORMLite ignores the other client of my table (even though I've marked it as "foreign = true" too).

How can I leftJoin on two columns using ORMLite?