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.
i personally tend towards a foucauldian definition of power, which argues among other things that power flows between people all the time, and force and power can be synonymous....
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.