After successfully setting up proftpd server, i want to add initial directory for each users, i have 2 user, webadmin that can access all folder and upload that can only access upload folder

...
# Added config
DefaultRoot                  ~
RequireValidShell            off
AuthUserFile                 /etc/proftpd/passwd

# VALID LOGINS
<Limit LOGIN>
   AllowUser webadmin, upload
   DenyALL
</Limit>

<Directory /home/webadmin>
   <Limit ALL>
      DenyAll
   </Limit>
   <Limit DIRS READ WRITE>
      AllowUser webadmin
   </Limit>
</Directory>

<Directory /home/webadmin/upload>
   <Limit ALL>
      DenyAll
   </Limit>
   <Limit DIRS READ WRITE>
      AllowUser upload
   </Limit>
</Directory>

All set ok, but i need to tell my ftp client initial directory for each user (otherwise it keep fail to retrieve directory), which i think it should be automatically set for each user (no need to type initial directory in ftp client)