I need effectively eliminate (by zeroing) the consecutive "1's" between "-1's" and start/end of column at each column of matrix A, which now can be separated by any number of zeroes. The number of consecutive "1's" between "-1's" and start/end of column is > N. This is a non-trivial generalization of my previous Question.

Again, typical size(A) = [100000,1000].

See example:

A =
     1    -1     0
     0     1     1
     0     1     1
     1     1     0
     0     0     1
     1    -1     0
    -1     1     1
    -1     0    -1
     1     1     1
     0     1    -1

For N = 2 the expected result is

Aclean =
     0    -1     0
     0     0     0
     0     0     0
     0     0     0
     0     0     0
     0    -1     0
    -1     0     0
    -1     0    -1
     1     0     1
     0     0    -1

For N = 3 the expected result is

Aclean =
    1    -1     0
    0     1     0
    0     1     0
    1     1     0
    0     0     0
    1    -1     0
   -1     1     0
   -1     0    -1
    1     1     1
    0     1    -1