"different identities" is a perfectly correct and usable phrase in written English.
You could use it in a sentence such as "The author explored the issue of different identities in the workplace."
Moreover, epifaunal assemblages showed significant differences between macroalgae mainly due to the different identities and relative abundance of epifaunal species.
Onstage, Storyboard's theatrical outfits help him assume different identities.
He claims different identities and Social Security numbers.
In today's world, individuals have different identities and belong to different groups and communities.
You write, you edit, you teach – how do you manage all these different identities?
Yet it is just one of many different Spanish regions, all with different identities.
Ellis shifted cannily between different identities, trading on the baseline anonymity afforded by the big city.
At that point in your life you're given a thousand different identities.
So there's been some tension there, and also reconciling different identities.
We have different histories, different identities, and we bring all of that forward with us.
Belgium, Greece and others have multiple national theatres to represent different identities.
