Filters to prevent some jobs being displayed to candidates

Our university is developing a sustainable careers policy and we would like the ability to block job feeds from certain organisations e.g. fossil fuel companies. This can either be done at the company or industry level although so that in "oil, gas and utilities" does we can still include companies that are not fossil fuel organisations.

Is there a way to also block unpaid internships?

I have now learned that there is a network feed and a web feed. I would need this functionality to apply to both feeds as currently there is no admin function that can be applied to the web feed and so jobs just come in un-filtered.