Dutroux, 56, asked a special court in Brussels to be released into house arrest with electronic tagging.
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The chief inspector of prisons said electronic tagging, which costs less than a third of imprisonment, was one option.
Curfew orders enforced by electronic tagging would be available to courts across England and Wales from Wednesday, he said.
Electronic tagging is used to monitor criminals when they are released and to make sure they stick to any curfews.
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As well as community service and probation, other non-custodial penalties in Scotland include electronic tagging and drug treatment and testing orders.
In his Commons statement on Monday, Mr Straw also set out controversial measures such as drug testing at arrest and electronic tagging.
Electronic tagging of 150 great white sharks found off the coast of central California revealed similar findings - the sharks gather in "hotspots".
However, he called for a higher maximum penalty as well as increased use of "restrictions on liberty", such as electronic tagging and curfews.
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Such orders, involving a variety of restraints such as electronic tagging, bans on unauthorised visitors and electronic communications as well as strict curfews, can be imposed on the simple say-so of the home secretary for indefinitely renewable periods of 12 months.
But one thing is plain: there is a big growth area for security firms in the justice system: moving prisoners, electronic tagging and actually running prisons, like Securicor's one at Bridgend, in Wales, or the three, plus three centres holding would-be immigrants, that Group 4 runs in England.
The head of the National Farmers Union Scotland (NFUS) has welcomed the political support given to industry concerns over electronic sheep tagging.
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