A few things~
First, there's no need to make such a quick bump. People may not be so readily online to answer a question, so a little patience can go a long way. You should also take a quick read of the
Newbie's Guide to Chaos Project, seeing as you're relatively new here (Welcome!). One of our rules is to not double-post within the next 24 hours, especially for a simple bump, since we can all see your message existing.
Secondly, as MarkHest said, you might want to go a little more detailed in your question. Not quite sure what you're asking, hehe! I might have an idea, so I'll assume this is what you're asking until you clarify yourself a bit more.
Are you asking how to have a conditional branch that uses the Player's level as a condition (eg. You must be at least Level 50 to enter) ? If that's the case, then you can use a variable for this. In the Variable Operations tab, you can set a variable, say we name it PLAYER LEVEL or something, to the Actor section, then select your Actor and Level. Once PLAYER LEVEL is set, make a conditional branch that asks if that particular variable, PLAYER LEVEL, is above, below, equal to, etc. to the number you want.
Oh, and finally... Shouldn't this topic be in General RPG Maker Troubleshooting? O.o