The example below shows the .ini settings to cap data to 40kbps (both in and outgoing) but not list/commands (0 = unlimited).
Code:
[FTP-Listen]
Host = 192.168.1.1
Global_Inbound_bandwidth = 0
Global_Outbound_bandwidth = 0
Client_Inbound_bandwidth = 0
Client_Outbound_bandwidth = 0
[FTP-Data]
Host = 192.168.1.1
Ports = 1401-1500
Global_Inbound_bandwidth = 40
Global_Outbound_bandwidth = 40
##################### SERVICES #######################
[FTP_Service]
Type = FTP
Device_Name = FTP-Listen
Data_Devices = FTP-Data
Port = 7777
Then you can set per user speed limits using SITE CHANGE <user> SPEEDLIMIT <dn limit> <up limit>.