Yes. These are the parameters I used for the first import:

USERID=...
FILE=...
LOG=...
FROMUSER=USER-A
TOUSER=USER-B
BUFFER=128000
ANALYZE=N
GRANTS=Y
COMMIT=Y
INDEXES=Y
IGNORE=Y
CONSTRAINTS=Y
ROWS=Y

2nd Import:
USERID=
FILE=...
LOG=...
FROMUSER=USER-A
TOUSER=USER-B
BUFFER=128000
ROWS=N
IGNORE=Y