I was hoping that one of sisters will answer this question but as did not see any reply I am answering briefly:

Jealousy of the wife over her husband can be against the rule of Allah Who allowed the man under certain conditions to have another wife. Jealousy against a rule from Allah is direct or indirect objection on Allah's rule, that is why it is bad.
Jealousy of man over his wife is against any relation between his wife and any other man, which is always a sinful act because she is a married woman and never allowed any act or word which can initiate a relation with another man. Husband's jealousy over his wife (without false allegations) is good to protect her and the whole family from a sinful act. You can then compare between a jealousy going against Allah;s rule and a Jealousy to protect the wife and the family from a sinful act.

'Wassalam.