PureFTPd clarification and solution needed

[benison]

Hi guys, need some help and I was hoping someone could shed some light here.

What does the below mean? The number of CUTEFTP connecting, am I correct.
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# Maximum number of simultaneous users

MaxClientsNumber 50
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What does the below mean? Is it the number of 8 CUTEFTP connections in 1 IP.
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# Maximum number of sim clients with the same IP address

MaxClientsPerIP 8
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What does the below mean? Is this multi-threaded per ftp user or basically how many connect can a ftp user connect at once (session)
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# Per-user concurrency limits. It will only work if the FTP server has
# been compiled with --with-peruserlimits (and this is the case on
# most binary distributions) .
# The format is : <max sessions per user>:<max anonymous sessions>
# For instance, 3:20 means that the same authenticated user can have 3 active
# sessions max. And there are 20 anonymous sessions max.

# PerUserLimits 3:20
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Basically I'm trying to setup this. Able to allow user to download files in multi-threaded for faster downloads and to avoid 421 error connection. When a FTP user for example john@testing.com is downloading files with multi-threaded, no one else can use the same username to access or download (to deter ftp sharing and multiple logins)

Tue Oct 23 03:16:24 2007 220-You are user number 36 of 75 allowed. - Theres only 5 ftp user, but theres like 36 user using?? I'm using flashget to access ftp. Confuse.

Hope you guys understand what I mean.