How to split (IMAP client side split) incoming mails into groups for multiple emails addresses with Gnus

[gnuforever]

Hi all,

Happy GNU year 2018.

I have different email addresses. For each address, I want to split incoming 
mails into groups.
So far I have managed to split incoming mails for one address with the code 
below:

;; IMAP
(setq gnus-select-method
      '(nnimap "firstEmail@domain.com"
               (nnimap-address "imapserver")
               (nnimap-inbox "INBOX")
               (nnimap-split-methods default)
               (nnimap-expunge t)
               (nnimap-stream ssl)
               (nnimap-user "firstEmail@domain.com")))

(setq nnmail-split-methods
      '(("INBOX.folder1" "from:.*friends@domain.com")
        ("INBOX.folder2" "from:.*family@domain.com")
        ("INBOX"  "")))

;; Tree view for groups
(add-hook 'gnus-group-mode-hook 'gnus-topic-mode)
;; Manage groups
(eval-after-load 'gnus-topic
  '(progn
     (setq gnus-topic-topology '(("Gnus" visible)
                                 (("firstEmail@domain.com" visible nil nil))))

     (setq gnus-topic-alist '(("firstEmail@domain.com"
                               "INBOX"
                               "INBOX.folder1"
                               "INBOX.folder2"
                               "Sent"
                               "Drafts"
                               "Junk"
                               "Trash"
                               "Sent Messages")
                              ("Gnus")))))

My question is, how do I extend the code above to split incoming mails for my 
second email address (secondEmail@domain.com)?

I have tried this code below, but it doesn't work.

(setq gnus-secondary-select-methods
      '((nnimap "secondEmail@domain.com"
                (nnimap-address "imapserver")
                (nnimap-inbox "nnimap+secondEmail@domain.com:INBOX")
                (nnimap-split-methods default)
                (nnimap-expunge t)
                (nnimap-stream ssl)
                (nnimap-user "secondEmail@domain.com"))))

(setq nnmail-split-methods
      '(("nnimap+secondEmail@domain.com:INBOX.work" 
"from:.*colleague@domain.com")
        ("nnimap+secondEmail@domain.com:INBOX" "")))


Cheers,

Steve