I usually strain the beer on its way into the fermenter.
As for filtering from secondary...get a fine large muslin bag or a 5 gallon paint strainer bag, sanitize it and put it into your fermenter with the racking cane/auto-siphon inside it. To filter yeast you need a 10 (I think it is 10...) micron filter or smaller there is not a muslin bag on the planet that can do it!
“I'm not drunk, I'm from Wisconsin.”
We have been out drinking your state since 1848!