People use subtle coercion and manipulation in their daily lives regardless of their philosophical or political views. I guess it depends on what you mean by coerce and force because they can be viewed as cinnamons synonyms in instances (because of the potential peer pressure, I spelled it correctly).Peer pressure is coercion and I'd say some anarchists use it towards their anarchist pals, like for trying to maintain obedience to ideological purity...I guess, sure, you can use coercion or force against authoritarians, if you want.
yes. it is consistent with anarchist principles to use some level of force or coercion against authoritarians. as far as i know, there isn't really any debate about this among anarchists, except for among pacifists. the level might be in question, and what counts as an authoritarian, and under what circumstances (self defense? what counts as self defense?) might also be in question, but as stated, the answer to your question is yes.
note: i'm sure i'm defining force / coercion more broadly than you are. this is what happens when you ask a vague question though.