Is there any plugin to upload only PDF, MSdoc files

is there any plugin to upload only PDF, MSdoc files. i have installed File 1.8.1. and looks like members can upload any kind of files. which is risky.

So is it possilbe to make the file 1.8.1 plugin to upload only MS Office files, pdf, .png, .gif, .jpg, and .mp3?

Or

Is there any any plugin where my members can only upload PDF, MSdoc files

any suggestion is very much appriciable

thanks in advance