So I bought the Rezo 50. This has a zipper front pocket and also on the also the additional flap with Velcro closure, which has but no real "lock function" more by the zipper, but preserves the aesthetics of Rezo series. For the Panasonic Lumix DMC-TZ7EG the Rezo 50 is a little too big. The camera has around 1 cm air; at the Rezo 30 it sits snugly in your pocket.
PS: As with all Lowepro camera bags previously used by me the zippers go at the beginning a little strict. This is, however, after some time of their own.
SUPPLEMENTARY August 2012:
The zipper of the main compartment is pulled out at one of the corners (more specifically the acrylic teeth), but this was recognized by Amazon easily as warranty replacement. This has happened for the first time at a Lowepro bag with me. Therefore, no deduction in the evaluation.
Update August 2014:
The zipper of the new bag holds up to now and it does not look as if that would change. The Sony DSC-HX60 fits incidentally also very good in the pocket.