with that sort of beer you may want to ramp the temp up towards the end of fermentation, to force the final bit of yeast activity to help get the dry finish characteristic of that beer (assuming this is like a tripel style of beer? the weird names bjcp gives to these throw me a bit!). in addition these beers are sometimes lagered for a period (a few weeks to a few months) to help them clear up, but i know many people skip this step with great results. so short answer- no. once it's done the initial stages of fermentation the yeast aren't going to make any more overly funky compounds like esters or fusel alcohols. long answer- yes.