Yes, in most cases you can...I have purchased many items made for Poser, specifically for use in DS3 without any problems.

Most vendors will state quite clearly their products DO NOT WORK IN DAZ..so, I never bother with those. Where vendors say NOT TESTED IN DAZ.....I have purchased those without problem too.

If you are unsure if something will work or not simply contact the Vendor before you purchase.  They are very reasonable people and will give you the information you require.