Text color change in a single cell?

[Ticho <tichowrl centrum sk>]

Hi list, 
I have created a GtkListStore, displayed by GtkTreeView model. I let the
model display two columns, both using GtkCellRendererText, as they have
text contents. 
 During application runtime, I need to change color of text of a single
cell in a single row (i.e. second column in third line). I tried
changing property "foreground" to the appropriate GtkCellRenderer, but
that changes text color of entire column.
 Can someone please nudge me in the right direction? Thanks in advance.
-- 
Andrej "Ticho" Kacian       mailto:tichowrl centrum sk

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