Yes.

This question comes up enough, in various forms, that a search here should turn up a few threads.

Basically, though -- Carrara is fine for making a Poser mesh.  It lacks several things that other modeling applications offer for this task.  In return, though, it offers a GUI and workflow that some of us find too comfortable to leave easily!

Once built, you can of course rig your new item as a Carrara Native figure.  The Carrara joint system is in many ways more powerful than the Poser joint system.  And if you are using Carrara Native mode to import Poser content, your new figures should be right at home.

As for making something that is useable in Poser or DAZStudio, though...

As of this moment the ONLY tool that allows you to do the final tweaking of joint parameters is Poser itself.  You don't need the latest version of Poser, but you do need Poser to go from a "sort of works" to "works pretty well" figure.

However, before that final step you have a number of different options.  At least one of those options does not involve Poser at all; to wit, using a text editor to change a few lines in the cr2 of a different figure, so as to give that figure your new mesh.