Contract Heroes' jobs weren't limited to a single faction. In fact, it was the opposite— it was quite easy to issue a job since there weren't too many Contract Heroes in the first batch. Basically, all the factions and countries within the Ayer Faction could issue a job. However, whether the Contract Heroes would see the job or not depended on whether the job was approved by the internal auditors.
My Contract Heroes system was a service platform, so I copied Amazon's reviews system for having both buyer and seller reviews. There would be reviews for the job issuers as well so that nobody could intentionally set traps.
However, where my review system differed was in the fact that it didn't look at how many jobs a faction or individual had issued in the past. Instead, the assessment of their overall trustworthiness was based on their identity, past history, allegiance, and so on.