No, it doesn't natively accept Poser files: but with the Turbo Importer (that is included with Bryce) you can upload .pz3 files in Daz Studio (that is free for now), then export it as Bryce files and then load it into Bryce (the file is a static one- you can't pose the models after importing). Try to see if Bryce is the app for you, and wait for the 5.5 release.