Condis aren't typically anemones that clownfish host. They're also a dime a dozen. They might sting some corals if they wander around the tank. Some anemones can pack a brutal sting. The LTA I have isn't bad, but the GBTA has a more powerful sting, at least when I've touched them on accident.
If you've got a condi (or two) in the 10 now, I for sure wouldn't add an LTA. Heck, I wouldn't put an LTA in a 10 anyway, even if you didn't have a Condi in there.