Yes, this is doable. This feature is related to conditional formatting of cell and rows which is under dev. and planned for upcoming version.

Hello again,

I just released a feature update for formatting option that met your requirements.
You can set different css styles for columns that are editable=>true.

Follow this link for more details.
http://www.phpgrid.org/updates/column-based-formatting/

Regards,

I've emailed you an update, kindly recheck after updating it.

I can only format all rows for an editable column. Can I format the editable column conditionally? for ex, col1 and col2 are editable. I want to color col2 if col2 > col1.

I am also trying to format specific cell colummn when setting column condition, but not working. could you email the update for this as well.
thanks.

I guess, you already have updated build so there must be some code level issue.
Please refer demos/appear/conditional-format.php