This doesn't really pertain to Star Trek in particular, but pretty much any feature of the body can be used for biometrics, because no two individuals share identical organs or biometrics in any part of their body if you look carefully enough. It all boils down to relative factors like accessibility, permanence, (social) acceptability, technology, measurability/collectibility, and circumvention.
Whether blood vessel patterns, ear geometry, gait, facial landmarks, body odor, keystroke dynamics, skin texture analysis, or other biometric identifiers are used really just depends on the desired application. So, even though from a human's perspective, Bajoran nasal ridges are all pretty similar, they would probably still be capable of being used for biometric identification.
Whether Klingon cranial ridges can be used like fingerprints also depends on what you're planning on doing with them. If you're trying to dust a crime scene for cranial ridges, then like Jeff humorously points out, it probably won't work. (You'd probably also be hard pressed to get Worf to stamp his forehead on an inkpad.)
It's also worth noting that human fingerprints are significantly influenced by environmental factors, so twins or genetic clones won't have the same fingerprint. This may not be true with Klingon cranial ridges.
Lastly, if you compare Alex Rozhenko's cranial ridges from when he was a child and when he was a young adult, they look significantly different. This is very different from human fingerprints, which are formed in utero and remain the same for the most part.