Attributes as a signup criterium for raids?

[Vingilotz]

Boa recently revamped the LOTRO game pack, and I discussed attributes with him. In LOTRO "radiance" is an armour attribute that is required for certain raids (e.g. you need minimum 50 radiance to fight The Watcher).

I know signups are commonly gated by the level of the character. I was wondering if there is an option/mod to use attributes as a signup criterium as well?

So for example that players need to be at least level 59 AND have 50 radiance to be able to sign up for the mentioned Watcher raid?

Any ideas and comments appreciated.