depends on which type youre talking about.

Image based UV mapped textures, yeah sure no problem. Just set it up in blenders material room.

example: in mat room. click add new texture. name it. select map input>UV. select map to>col.
Click the texture button (f6). select Image from the type drop down. Click Load Image and use the file requestor to find your image map.

Poser5 procedural textures? No. at least not that I know of. A python would have to be writtin to do that I think.