If you mean can you check if a stat or a skill is within a specific level to control the flow of the dialogue then yes, this is possible.
In a conditonal branch you can use something like this
For skills:
$sl.getSkillLevel(1, "melee") >= 30
which will make sure the melee skill is above or equal to 30 before allowing specific dialogue or actions to perform from an npc.
For stats:
$sl.getStatLevel("str") >= 10
This will check the first actor's strength stat and if it's above 10 then it will proceed.
We hope this helps.