To quote from http://jobs.perl.org/employer/post:

Any job submitted to this site must be primarily a Perl job. This means that you can request other skills but that Perl is expected to be the focus of the position.

Postings are moderated by jobs.perl.org editors. Among other things, they require that

You need to have the funds to pay anyone you hire. A job where the payment solely consists of equity in a business venture or a share of the (expected) profits is not acceptable. In addition, a job where payment cannot be negotiated before work commences is also not acceptable. For short (< 1-2 months) contract jobs, you are expected to be able to pay for a project at its completion. For longer contract jobs, you are expected to pay at regular intervals. For salaried jobs, it is expected that the salary will be paid on a regular basis starting at the time of an employee's hire. Postings for uncompensated volunteer work for non-commercial purposes are acceptable, [however].

Their requirements are reasonable, I suppose, but it's still rather more restrictive than simply knowing the site exists.