Some people in my server wanted to have their own suffix, but I haven't found a permission to allow a user the ability to attribute himself a suffix without being able to modify thoses of other users.

So I though about it and a argument self like, for the request I got, /lp self meta addprefix <priority> <suffix> [context] with the perm luckperm.self.__ could be great! 😄

What do you think?

In my opinion is adding/managing own suffixes more a thing of a separate plugin, that will hook into LP.
Or perhaps a Tags-plugin like DeluxeTags would be your choice.

You can already let players modify their own prefixes. You need to enable argument-based-permissions in the config. Then the permission checks of LP will be a lot more detailed.

Then with verbose you can figure out the permissions you need so players can only modify their own prefixes.

Though the command will stay like /lp user <player> ...

Damn I haven't read that part of the wiki! Thanks for your reply, that's exactly what I was looking for.