[Scootworks]

something like this?

local function CheckBuffs(_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, abilityId)
    for i = 1,GetNumBuffs("player") do
        local _abilityId = select(11, GetUnitBuffInfo("player", i))
        if(_abilityId == abilityId) then
            -- do something
        end
    end
end
EVENT_MANAGER:RegisterForEvent(addon.name, EVENT_EFFECT_CHANGED, CheckBuffs)

?